| block of glycosyltransferases |
showed evidence of |
hard sweep (H12 = 0.87) |
Ipomoea purpurea |
| genetic, epigenetic and transcriptomic variation |
was examined in |
samples from 21 natural populations across three climatically distinct geographic regions |
Fragaria vesca |
| minor differences in uptake |
may have resulted from |
genetic variation among populations |
Amaranthus tuberculatus |
| frequency of gbM/unM/teM epigenomic states in the population |
calculated to determine |
relationship between frequency of genic methylation states and rate of SNPs in natural Arabidopsis thaliana population |
Arabidopsis thaliana |
| Translocated paralogs that gained teM methylation |
showed higher |
polymorphism in Arabidopsis thaliana accessions compared with their parental unM and gbM paralogs |
Arabidopsis thaliana |
| demographic processes |
may influence |
molecular composition |
|
| resampling bias of populations |
would predict |
decrease in allelic richness |
Viola arvensis |
| life-history traits |
shape |
amount and distribution of genetic diversity across a species range |
|
| third and fourth principal component axes |
explained |
< 0.4% each |
|
| K = 6 |
resulted in |
Turkish and Black Sea populations split from the Western Europe populations |
|
| linkage and linkage disequilibrium |
indicates the potential role of |
both linkage and linkage disequilibrium in maintaining the cost |
Ipomoea purpurea |
| multiple loci |
show evidence of |
ILD |
Ipomoea purpurea |
| three genic methylation classes |
showed significant differences in |
polymorphism |
Arabidopsis thaliana |
| absolute differences in the rate of SNPs and weighted methylation levels between duplicate paralogs |
determined as |
response variable |
Arabidopsis thaliana |
| inbreeding coefficient (F IS ) |
ranged from |
−0.088 to 0.2 |
|
| one Romanian population |
was slightly differentiated from |
rest of the sampling |
|
| more negative Tajima's D |
can be caused by |
elevated mutation rates |
Arabidopsis thaliana |
| selection |
is expected to be more efficacious in |
larger populations |
|
| expanding populations |
show no increased |
genetic load |
Scots pine |
| ratio c / s < 10 −4 |
would result in |
hitchhiking would almost be complete |
Ipomoea purpurea |
| DNA methylation patterns of genes |
influence |
differential accumulation of sequence polymorphism in natural populations |
Arabidopsis thaliana |
| parallel changes in morphology |
is not consistent with |
drift |
Veronica arvensis |
| genetic drift |
would predict |
decrease in allelic richness |
Viola arvensis |
| pairwise F ST between populations |
ranged from |
0.009 to 0.127 |
|
| Scots pine populations |
have |
no signal of genetic load |
Pinus sylvestris |
| local regions of long-distance linkage disequilibrium and ILD |
might be generated by |
genetic drift |
Ipomoea purpurea |
| recombination |
should decouple |
cost alleles that are physically linked to resistance alleles |
Ipomoea purpurea |
| inbreeding |
causes |
increased genetic drift |
|
| reduced genetic richness in Commeny |
is associated with |
most pronounced change in morphology |
|
| wind-pollinated outcrossing species |
are generally expected to have |
weaker genetic structure |
|
| recessive and additive genetic loads |
were not correlated with |
latitude or longitude |
|
| frequency of gbM within the population |
showed weak negative correlation with |
rate of SNPs |
Arabidopsis thaliana |
| teM paralogs in unM-teM and gbM-teM pairs |
showed a significantly higher percentage of |
polymorphism in natural populations compared with the unM and gbM paralogs |
Arabidopsis thaliana |
| translocation itself |
doesn't increase |
rate of polymorphism irrespective of methylation |
Arabidopsis thaliana |
| demographic model |
suggests that changes at land plants, vascular plants, seed plants, and angiosperms moved lineages closer to |
mutation-drift equilibrium |
|
| demographic events |
shape |
amount and distribution of genetic diversity across a species range |
|
| impact of landscapes and environments on population differentiation |
remain scarcely studied for |
Scots pine |
Pinus sylvestris |
| genetic differentiation and geographic distance |
showed pattern of |
isolation by distance (IBD) |
|
| combination of concise geological history and close geographical proximity of Izu Islands |
has led to |
lower degree of genetic divergence between plant populations on islands and mainland |
|
| genetic variation among individuals in the wild |
is much greater than |
genetic variation in experimental populations |
|
| Ipomoea purpurea populations |
show evidence of |
genetic admixture |
Ipomoea purpurea |
| (anac025, NAC025, NAC25, AT1G61110) and (NFD6, AT2G20585) |
are physically linked on chromosome 6 to |
regulatory region exhibiting ILD to CYP76A2 gene on chromosome 10 |
Ipomoea purpurea |
| this study |
aims to highlight |
origin and prevalence of different alleles and haplotypes associated with the semi-leafless phenotype |
Pisum sativum |
| negative D value at avrRpv3.1 locus |
suggests |
strong deficit of heterozygous genotypes |
Plasmopara viticola |
| SNPs in exons of (AVB1, IFL, IFL1, REV, AT5G60690) |
could indicate |
low allelic frequency of exonic SNPs in the population |
Populus trichocarpa |
| summary statistics for signatures of selection |
calculated for |
each Arabidopsis thaliana gene |
Arabidopsis thaliana |
| Tajima's D |
affected by |
selection and mutation rate |
Arabidopsis thaliana |
| distinct genetic signature in extant populations |
includes |
declining genetic diversity along migration routes |
Pinus sylvestris |
| testing these hypotheses |
requires |
sufficient genetic information |
Pinus sylvestris |
| avrRpv3.1 locus |
is in |
strong Hardy-Weinberg disequilibrium |
Plasmopara viticola |
| inbreeding coefficient (F) |
is typically used to measure |
average level of inbreeding |
|
| global distribution of genome sizes in angiosperms |
is mainly shaped by |
genetic drift |
|
| logarithm method |
indicated |
20 groups |
|
| highly differentiated region on (CHD3, CHR6, CKH2, EPP1, GYM, HRB2, LWR1, PKL, SSL2, AT2G25170) |
exhibited alternate alleles in |
resistant and susceptible populations |
Ipomoea purpurea |
| percentage of nucleotides with polymorphism within 100-bp windows |
calculated for |
each gene |
Arabidopsis thaliana |
| Jost's D index |
was used to assess |
genetic differentiation between first and last generation |
Brassica rapa |
| Goodyera similis on Kozu Island |
has significant gene flow to |
Goodyera henryi × Goodyera similis on the island |
Goodyera henryi; Goodyera similis |
| rate of SNP polymorphism |
showed weak but significant negative correlation with |
unM frequency |
Arabidopsis thaliana |
| large effective population sizes |
tend to make natural selection more effective |
natural selection |
|
| InDel4337-Del alleles in teosinte accessions |
have been diversified |
teosinte populations |
Zea mays subsp. parviglumis |
| wind-pollinated outcrossing species |
are generally expected to have |
higher genetic diversity |
|
| consecutive range expansions after contraction |
produce differentiation via |
genetic drift |
|
| testing these hypotheses |
requires |
comprehensive coverage of species distribution |
Pinus sylvestris |
| Scots pine |
is effectively |
panmictic species |
Pinus sylvestris |
| Plasmopara viticola |
has |
large population size |
Plasmopara viticola |
| avr1 allele |
was |
second most frequent (39%) |
Plasmopara viticola |
| region on chromosome 6 |
shows |
strong signals of selection (average Md-rank-P = 6.55; average (ATGSTU24, GST, GSTU24, AT1G17170) = 0.782) |
Ipomoea purpurea |
| strong demographic bottleneck |
would predict |
decrease in allelic richness |
Viola arvensis |
| unM genes |
showed 0.15× higher polymorphism in natural population compared to |
gbM genes |
Arabidopsis thaliana |
| InDel4337-Del frequency |
is substantially lower in |
teosinte lines (16%) |
Zea mays subsp. parviglumis |
| region under selection on (ASG3, CHR10, AT2G44980) |
exhibited |
the strongest LD to other chromosomal regions under selection |
Ipomoea purpurea |
| teM frequency in the population |
showed moderate positive correlation with |
rate of SNPs |
Arabidopsis thaliana |
| Tajima's D |
is more negative in |
teM genes compared with unM and gbM genes |
Arabidopsis thaliana |
| greater polymorphism combined with a more negative Tajima's D value in teM genes |
consistent with |
expected effects of elevated mutation rates and a weaker distribution of fitness effects of new mutation |
Arabidopsis thaliana |
| Whole-genome duplicates (WGDs) |
had lower polymorphism compared with |
four different types of single-gene duplicates (SGDs) |
Arabidopsis thaliana |
| species survived in many micro-refugia scattered across current distribution |
would predict |
little decline of diversity in the north |
Pinus sylvestris |
| Spanish populations |
were separated from |
rest of the samples |
|
| limited gene flow in Arabidopsis |
is not able to counteract |
effect of drift in populations |
Arabidopsis thaliana |
| four highly differentiated regions under selection |
showed higher LD with one another |
compared with four randomly pulled, but highly differentiated regions between resistant and susceptible populations not under selection |
Ipomoea purpurea |
| multiple glycosyltransferases and cytochrome P450s under selection on (ASG3, CHR10, AT2G44980) |
showed high ILD with |
SNPs on (CHR11, AT3G06400) |
Ipomoea purpurea |
| Commeny population |
exhibits slight decrease in |
allelic richness |
Viola arvensis |
| rapid colonization from few isolated refugia |
is expected to leave |
distinct genetic signature in extant populations |
Pinus sylvestris |
| species survived in many micro-refugia scattered across current distribution |
would predict |
weak differentiation between populations |
Pinus sylvestris |
| extensive sampling of 2321 Scots pine individuals from > 200 populations |
aimed to assess |
genetic and environmental associations |
Pinus sylvestris |
| these analyses |
enhance understanding of |
how diversity correlates with geography, demography and climate adaptation |
Pinus sylvestris |
| effective population size |
tends to be greater than |
n = 10^3 |
flowering plants |
| hitchhiking would almost be complete |
could result in |
cost alleles could become fixed in populations |
Ipomoea purpurea |
| nonsyntenic SGDs such as translocated and dispersed duplicates |
had lower polymorphism in natural accessions compared with |
local SGDs: tandem and proximal |
Arabidopsis thaliana |
| population size |
plays a compounding role in |
genome composition evolution |
|
| selection |
shapes |
amount and distribution of genetic diversity across a species range |
|
| Tajima's D values |
were all highly |
negative |
|
| major changes in traits and life history across the Viridiplantae |
are associated with |
longer generation times and/or reductions in effective population size |
|
| patterns in base composition shifts that occur at key nodes in plant phylogeny |
are likely the result of |
some combination or subset of population processes |
|
| K = 2 |
observed clear gradient between |
western (Spanish) and eastern (Chinese) populations |
|
| genetic differentiation |
showed weak correlation with |
environmental distance |
|
| lack of correlation between π 0 /π 4 ratio and Tajima's D |
indicated no increase in |
genetic load in the expanding northern populations |
|
| SNPs along contig Primary_000014F |
were |
at Hardy-Weinberg equilibrium (>95%) |
Plasmopara viticola |
| inbreeding depression |
reduces |
genetic diversity of selfing populations |
|
| changes at land plants, vascular plants, seed plants, and angiosperms |
moved lineages away from |
strong natural selection and BGC |
|
| extensive gene flow |
is predominantly responsible for |
observed genetic patterns in Scots pine |
Scots pine |
| 123 large populations |
showed |
pairwise nucleotide diversity (π) with average of 0.0062 differences per base pair |
|
| K = 5 |
resulted in |
Russian populations west of the Ural Mountains differentiated from the rest of the Asian populations |
|
| presence and absence genotypes on chromosomes 3 and 4 |
existed in |
strains from South America |
Magnaporthe oryzae |
| TEM genes |
have a higher level of |
polymorphism than gbM |
Arabidopsis thaliana |
| inbreeding |
causes fitness measures to |
decline |
|
| natural populations |
have the potential to respond quickly to |
environmental changes |
|
| π values, including π 0 , π 4 and the π 0 /π 4 ratio |
decreased slightly with increasing |
latitude and longitude |
|
| biotic interactions |
may influence |
population genetic structure in Scots pine |
Pinus sylvestris |
| TEM genes |
showed the highest |
rates of polymorphism |
Arabidopsis thaliana |
| Genes with a higher frequency of gbM |
show a lower proportion of |
polymorphism across the population |
Arabidopsis thaliana |
| principal component analysis |
evidenced |
population structure bias |
Plasmopara viticola |
| Disease resistance phenotypes |
were segregated between and within |
populations |
Arabidopsis thaliana |
| TEM genes |
showed 1.37× more polymorphism than |
gbM genes |
Arabidopsis thaliana |
| first two principal component axes ( (APC1, PC1, AT5G17480) and PC2) |
explained |
< 2% of the overall genetic variation |
|
| K = 12 |
resulted in |
Caucasus populations separated from Asia Minor |
|
| global F ST among the 123 large populations |
averaged |
0.048 |
|
| clonality |
results in |
reduction in genetic diversity |
|
| experiment using single genotype pairs of diploids and their neopolyploid progeny in competition |
is limited by |
lack of genetic variation among individuals |
|
| four highly differentiated regions under selection |
showed |
islands of elevated ILD in a backdrop of nearly zero genome-wide ILD |
Ipomoea purpurea |
| inbreeding depression |
is |
well-known |
|
| first principal component axis (PC1) |
followed |
rough south–north direction in west-central Europe |
|
| 40 out of 42 individuals sampled from Kozu Island |
were classified as |
individuals resulting from repeated crossing among hybrids of Goodyera henryi and Goodyera similis |
Goodyera henryi; Goodyera similis |
| Disease resistance phenotypes |
did not follow |
obvious geographical or population structure patterns |
Arabidopsis thaliana |
| linkage disequilibrium pattern across (AVB1, IFL, IFL1, REV, AT5G60690) gene |
is likely incomplete due to |
possible ascertainment bias |
Populus trichocarpa |
| minor allele frequencies (MAF) |
hint at |
relative ages of mutations |
Populus trichocarpa |
| All resistant and susceptible genotypes |
carried |
(AT3G24580) Col-0 alleles |
Arabidopsis thaliana |
| 30% of individuals in the Gw population |
carried |
a conserved RPP1-like Ler haplotype |
Arabidopsis thaliana |
| geography |
acts as major determinant of |
population genetic structure in S. hermonthica |
Striga hermonthica |
| group II A. tauschii accessions |
have |
lower level of genetic diversity |
Aegilops tauschii |
| environmental clines |
correlate with |
changes in allelic frequencies at specific candidate genes |
|
| research objectives |
include determining |
population genetic structure in S. hermonthica sampled from Eastern and Western Africa |
Striga hermonthica |
| distinct epigenomic features in unM, gbM, and teM genes |
associated with |
accumulation of polymorphism in genes at the population level |
Arabidopsis thaliana |
| genetic drift |
would predict |
decrease in genetic diversity |
Viola arvensis |
| Tajima's D |
showed weak correlation with |
longitude |
|
| low interspecific heterozygosity in hybrids |
indicated that |
significant portion of Goodyera henryi × Goodyera similis on Kozu Island are genetically admixed hybrids of later generations |
Goodyera henryi; Goodyera similis |
| positive selection |
results in |
negative Tajima's D value |
Hordeum vulgare |
| amplified fragment length polymorphism (AFLP) |
is used for |
S. hermonthica genetic diversity studies |
Striga hermonthica |
| Tajima's D test |
suggested that HTD1 deviated significantly from |
neutral expectation |
Oryza sativa |
| accessions in panel |
could be used for |
GWAS analysis |
Brassica juncea |
| linkage disequilibrium (LD) decay |
was estimated on the basis of |
pairwise r 2 measures |
Zea mays |
| genetic structure of the mapping panel |
is reminiscent of |
two populations of which it is comprised |
Zea mays |
| linkage disequilibrium (LD) |
was higher in |
rootstock-type subgroup than in food-type |
|
| population structure across multiple causal loci |
can produce different genotypic combinations in different geographic regions |
geographic regions |
|
| large effect loci |
may be less variable in local populations with less genetic diversity and lacking broad geographic structure |
local populations |
|
| highly conserved and less polymorphic nature of ESTs |
results in |
Y53 expected to show slower linkage disequilibrium decay than would be expected for outcrossing species like Striga hermonthica |
Striga hermonthica |
| broad collection of genotypes |
might be due to |
very weak kinship |
Brassica juncea |
| mutation |
is one of the uncertain evolutionary forces causing |
linkage disequilibrium decay |
Striga hermonthica |
| Random amplification of polymorphic DNA (RAPD) |
is used for |
S. hermonthica genetic diversity studies |
Striga hermonthica |
| genetic recombination rate |
is one of the uncertain evolutionary forces causing |
linkage disequilibrium decay |
Striga hermonthica |
| linkage disequilibrium (LD) analysis |
estimated |
LD as a function of physical distance |
Hordeum vulgare |
| subpopulation-specific estimates of Tajima's D |
included both negative and positive values with strong skew towards |
positive mean values |
Hordeum vulgare |
| GWAS mapping panels |
capture |
deep pools of genetic variation from natural populations |
|
| pangenomes |
facilitate studies on |
population structure |
|
| SNPs |
are expected to be in linkage with |
intergenic loci, including non-coding DNA |
Zea mays |
| WG7 gene and flanking region |
have |
lower nucleotide diversity in indica and japonica cultivars |
Oryza sativa |
| method to genotype giant NORGs |
showed |
dynamic change in distribution of giant NORGs in rice natural population |
Oryza sativa; Oryza glaberrima |
| grain width differences between (HAP1, MAGO, MEE63, AT1G02140) and (ATHAP3, ATNF-YB1, HAP3, HAP3A, NF-YB1, AT2G38880) |
is likely caused by |
population structure |
Oryza sativa |
| 891,289 SNPs from resequencing population |
used to estimate |
relative kinship in population |
Brassica juncea |
| mating system |
is one of the uncertain evolutionary forces causing |
linkage disequilibrium decay |
Striga hermonthica |
| (FST, LHL3, LL1, AT1G64625) and XP-CLR (cross-population composite likelihood ratio test) |
showed similar results |
genome-wide selection analysis |
Oryza sativa |
| SNPs associated with MGR status |
have minor allele frequencies between |
0.051 and 0.284 |
|
| second model |
seeks to predict |
genotype values for genetic markers in the target interval |
|
| grain width between haplotypes within subpopulations |
shows no significant difference |
|
Oryza sativa |
| small DNA losses |
may overcome |
power of genetic drift |
|
| re-sequencing of a large number of germplasm accessions |
provides information on |
origin, domestication, and population structure |
|
| subpopulation-specific estimates of Tajima's D |
differed extensively |
among subpopulations |
Hordeum vulgare |
| genome-wide LD decay distance |
estimated to be |
>400 kb |
|
| Cucumis metuliferus |
has nucleotide diversity (π value) of |
1.61 × 10⁻³ |
Cucumis metuliferus |
| non-synonymous mutations in R-related genes |
were different in |
two Cucumis metuliferus groups |
Cucumis metuliferus |
| low recombination |
causes deleterious variants to persist in |
population |
|
| SSR markers |
are widely used for |
genetic investigation |
|
| winter/facultative barley group |
has PIC of |
0.17 |
Hordeum vulgare |
| primary maturity group set (MG I-VII) for DTF |
contained |
241 alleles (128 negative plus 113 positive) on 52 loci with average DTF of 50 days |
Glycine max |
| demographic processes |
modulate |
genome-wide levels and patterns of genetic variation |
|
| Zymoseptoria tritici (Z. tritici) populations |
harbour |
genetic diversity including rare mutations |
Zymoseptoria tritici |
| two-row barley group |
has PIC of |
0.17 |
Hordeum vulgare |
| G1–G3 |
are clustered together in one branch distantly separated from |
GS groups |
Glycine max; Glycine soja |
| rare variants |
tend to be more geographically restricted than |
common variants |
|
| co-appearance of SD1 DGWG with (HTD1, AT2G19540) 1005C |
is significantly higher than |
whole-genome random regions |
Oryza sativa |
| late maturity group set (MG VIII-IX/X) |
retained |
201 (83.40%) DTF alleles and 197 (80.08%) DTM alleles from primary MG set |
Glycine max |
| statistical bias arising from small sample population size |
could be difficult to eliminate when determining |
linkage disequilibrium |
Striga hermonthica |
| food and rootstock types of bottle gourds |
were genetically diversified |
genetic diversity |
|
| SNP LD blocks (SNPLDBs) |
handles |
multiple allele characteristics of a natural population |
Glycine max |
| early maturity group set (MG 000-0) |
retained only |
181 (75.10%) DTF alleles and 194 (78.86%) DTM alleles from primary MG set |
Glycine max |
| method to infer relatedness between tea accessions |
detected |
genetic signatures of 106 tea accessions |
Camellia sinensis |
| Cucumis metuliferus accessions |
show |
slower decay of linkage disequilibrium in group 2 than group 1 |
Cucumis metuliferus |
| local samples |
typically contain fewer polymorphic causal loci than |
samples collected across broader geographic ranges |
|
| WYS and GYC populations |
are |
existing DT and ET ancient populations respectively |
Euscaphis japonica |
| AMOVA analysis |
indicated very significant genetic differences among and within |
maturity groups (MGs) |
Glycine max |
| principal component analysis |
confirmed |
genetic divergence between market classes of cultivated tomato |
Solanum lycopersicum |
| pangenomes |
facilitate studies on |
genetic diversity |
|
| PCA and model-based clustering |
indicated |
weak population stratification |
|
| chromosome 2 |
is richest in |
SNPs |
Solanum melongena |
| comprehensive parallel analyses of soybean nuclear and cytoplasmic diversities |
are needed to address |
if there is a positive selection on soybean mitogenome |
Glycine max |
| spatial and temporal heterogeneity in population structure |
have different influences on |
persistence of new mutations and genetic variation |
|
| populations with no recent growth |
explain less additive genomic variance for |
rare alleles |
|
| ADMIXTURE analysis |
confirmed |
optimal classification of Euscaphis japonica populations (K=2) |
Euscaphis japonica |
| primary maturity group set (MG I-VII) for DTM |
contained |
246 (117 negative plus 129 positive) alleles on 59 loci with average DTM of 127 days |
Glycine max |
| groups of germplasm within a panel |
may be |
genetically distinct due to similar pedigree history within each |
|
| neighbor-joining tree constructed based on SNP-calling |
showed |
all samples were divided into DT and ET Euscaphis japonica |
Euscaphis japonica |
| higher Tajima's D values in DT populations |
may be because of |
population bottleneck effect, population structure, and unbalanced selection |
Euscaphis japonica |
| domestic soybean accessions |
are grouped in |
three different clusters with respect to the cytoplasmic diversity |
Glycine max |
| higher θw and θπ values in DT populations |
indicates |
DT populations have rich genetic diversity |
Euscaphis japonica |
| circadian studies sampling populations |
have drawn attention to |
hierarchical structure of genetic diversity in the wild |
|
| more genetic diversity |
results in |
more loci segregating for causal variants |
|
| cases of different causal variants across geographic regions |
were observed more than twice as often as |
shared causal variants across regions |
Arabidopsis thaliana |
| distribution of genome-wide set of over 33,000 genetic variants |
was analysed in terms of |
geographic region |
Hordeum vulgare |
| S. melongena accessions |
clustered separately from |
NMS accessions |
Solanum melongena; Solanum insanum; Solanum incanum |
| trees |
have |
intermediate levels of nucleotide variation relative to other plants |
|
| recombination |
determines the fate of |
new mutations in populations |
|
| geographically restricted allele distributions |
causes |
genetic basis of a trait to vary across regions |
|
| outcrossing species |
demonstrates |
higher genetic variation within structured populations than between structured populations |
|
| Striga hermonthica class with six and four populations each |
appear twice but with |
different linkage disequilibrium values |
Striga hermonthica |
| global barley panel |
analysed for |
distribution of genetic variants with respect to geographic region or historical breeding category |
Hordeum vulgare |
| unrooted phylogenetic tree of 50 accessions |
constructed based on |
SNP information |
|
| two subgroups from PCA |
matched |
usage types (food or rootstock) |
|
| pairwise sequential Markovian coalescent analysis (PSMC) |
was applied to assess |
demographic history of Euscaphis japonica populations |
Euscaphis japonica |
| Arabidopsis thaliana |
exhibits genetic differentiation between populations due to |
environmental adaptation or demographic history |
Arabidopsis thaliana |
| identification of selective sweeps |
can be confounded by |
population structure |
|
| founder events and population bottlenecks |
occur locally in highly structured populations |
highly structured populations |
|
| most alleles |
are rare (i.e., at low frequency) |
globally |
|
| local populations |
are already present in |
nature |
|
| early and late maturity group sets (six of 13 MGs) |
formed from |
QTL-alleles inherited from primary maturity group set |
Glycine max |
| hierarchical structure of genetic diversity in the wild |
unveils |
pronounced genetic variation on a scale of metres |
|
| genomic data from 700 to 3700-year-old European oak trees |
showed |
genetic diversity and population structure persistence over time |
Quercus alba |
| herbarium collections |
have been used to study |
plants' past genetic diversity |
|
| early maturity group set for DTF |
retained |
181 (104 plus 77) alleles with 24 negative and 36 positive in total of 60 alleles excluded |
Glycine max |
| G3 ('Bedford'-type) |
is |
one of five cytoplasmic groups in domestic soybean |
Glycine max |
| restricted geographic distribution of globally rare variants |
implies that each one will be more common in the region(s) where it is present |
locally rare variants |
|
| first model |
seeks to predict |
genotype values for genetic markers in the target interval |
|
| selfing |
reduces |
genetic diversity |
|
| 18 types of mtDNAs |
were reported in |
> 1000 Japanese wild soybean plants |
Glycine soja |
| linkage disequilibrium (LD) patterns |
are affected by |
mating, selection, genetic drift, and effective population size |
Euscaphis japonica |
| mtDNA SVs |
identified |
five cytoplasmic groups or mitogenome types in domestic soybean |
Glycine max |
| identification of selective sweeps |
can be confounded by |
gene flow from wild or feral populations |
|
| Hap-7A-3 distribution in Europe |
showed |
geographic bias with higher frequency in western than eastern Europe |
Triticum aestivum |
| ADMIXTURE analysis |
indicated |
no genetic exchange between DT and ET populations |
Euscaphis japonica |
| recombination events that resulted in intron losses and that were inherited to the next generation |
had the chance to increase in frequency in |
population |
|
| polymorphism spectrum of Os03g01450 |
showed |
slight deviation from neutrality |
Oryza sativa |
| linkage disequilibrium (LD) |
extends |
short distances in diverse maize inbreds |
Zea mays |
| low LD of DT populations |
may be accounted for by |
large effective population size |
Euscaphis japonica |
| sampling from a local population |
produces less allelic heterogeneity than sampling broadly because exclusion of geographically restricted alleles and overall reduction in genetic diversity lead to |
fewer alleles per locus |
|
| stepwise duplications |
could then continue to segregate as |
hemizygous loci in populations |
|
| non-random background co-ancestry among accessions |
is |
population structure and familial relationship |
|
| single nucleotide polymorphism (SNP) markers |
are used for |
population structure analysis |
|
| principal components analysis (PCA) |
divided |
46 accessions into two subgroups |
|
| populations that experience a bottleneck followed by recent growth |
explain more additive genomic variance for |
rare alleles |
|
| balance between influence on host fitness and transmission rate |
could determine |
frequency of eccDNA in a population |
|
| pangenomes |
play important roles in |
plant population genomics |
|
| large insertion at 987,580 |
was not present in |
any C. grandiflora sample |
Capsella grandiflora |
| effects of inbreeding depression |
are severe in |
Geranium maculatum |
Geranium maculatum |
| hypothesis that selection for market differentiation left a signature that could be detected through the analysis of genome-wide patterns of SNP variation |
was tested |
genome-wide patterns of SNP variation in cultivated tomatoes |
Solanum lycopersicum |
| Darwin's insights |
are often uncanny and productive for testing |
hypotheses about population-level studies |
|
| 384 wheat cultivars from 18 European countries |
showed |
average frequency of Hap-7A-3 of 41.4% |
Triticum aestivum |
| Hap-7A-3 frequency in European cultivars |
ranging from |
10% to 68.2% |
Triticum aestivum |
| trans-specific rather than species-specific clusters of S-RNases |
is a consequence of |
balancing selection and the longevity of alleles |
Prunoideae; Maloideae |
| resulting data |
were used to assess |
extent of inter- and intra-chromosomal linkage disequilibrium (LD) in cultivated tomato |
Solanum lycopersicum |
| observed heterozygosity (H o ) and expected heterozygosity (H e ) |
showed no significant variation along |
longitude |
|
| gbM genes |
have more negative |
Tajima's D than unM genes |
Arabidopsis thaliana |
| WGDs |
showed more negative |
Tajima's D values than local SGDs: tandem and proximal duplicates |
Arabidopsis thaliana |
| GbM translocated paralogs |
had lower |
rates of polymorphism compared to parental gbM paralogs |
Arabidopsis thaliana |
| genetic draft |
is |
interaction of inbreeding and selection |
|
| absence of reduction in genetic diversity in other locations |
could be due to |
recent increase in inbreeding |
|
| unmethylated genes |
showed |
intermediate rates of polymorphism |
Arabidopsis thaliana |
| ancestral populations |
exhibit no significant differences in |
genetic diversity |
Viola arvensis |
| expected heterozygosity (H e ) |
averaged |
0.277 |
|
| genetic differentiation |
correlated strongly with |
geographic distance separating the populations |
|
| genetic bottlenecks |
result in changes in |
allele frequencies |
|
| selfer populations |
may have |
reduced potential response to future selective pressures |
|
| outcrossing |
maintains |
genetic diversity within populations |
|
| isolation by distance (IBD) and isolation by environment (IBE) |
can act independently or in concert with |
how genetic variation is partitioned among populations |
|
| gene-tree conflict |
is potentially indicative of |
dynamic population processes and the reassortment of ancestral polymorphisms among descendant lineages |
|
| microsatellites and isozymes |
indicate that |
N. truncata is followed by N. solandri and N. cliffortioides most closely related |
Nothofagus truncata; Nothofagus solandri; Nothofagus cliffortioides |
| reduction of genetic richness |
could be the product of |
drift and of the interaction of inbreeding and selection |
|
| 25 830 SNPs |
showed no evidence of |
linkage disequilibrium |
|
| K = 10 |
resulted in |
Scottish populations were differentiated |
|
| genetically dominant nature of mapped resistance |
results in |
resistant plants heterozygous with expected ratio 1:1 |
Solanum berthaultii; Solanum ruiz-ceballosii |
| MsT–MsJR |
followed by with FST value of |
0.15 |
Miscanthus sinensis |
| gene flow between northern and southern M. sinensis |
non-significantly >0 |
gene flow level |
Miscanthus sinensis |
| MSG42_2 |
was differentiated in |
all intra-specific taxa |
Miscanthus |
| var. transmorrisonensis |
was |
most distinctive |
Miscanthus sinensis |
| ACD6-Est-1 allele |
is frequent in |
natural populations of Arabidopsis thaliana |
Arabidopsis thaliana |
| phylogeographic framework |
informs |
accession sampling |
Cardamine hirsuta |
| analysis of molecular variance |
revealed |
most genetic variants resided within populations |
Miscanthus |
| allopatric pairs (e.g. M. floridulus in Taiwan versus mainland China, and var. condensatus versus var. transmorrisonensis) |
had |
more outliers |
Miscanthus |
| inter-specific outliers |
are not simply |
extrapolation of intra-specific ones |
Miscanthus |
| Population cluster analysis |
divided |
612 upland cotton accessions into four groups |
Gossypium hirsutum |
| levels of variation across miRNA-encoding loci |
vary significantly |
across loci |
Arabidopsis thaliana |
| population-level analysis of nrITS haplotypes |
revealed |
predominant Canina types in all 16 accessions |
Rosa canina |
| intervals harboring genes involved in detoxification |
show high ILD values between |
intervals harboring genes involved in stress signaling and response |
Ipomoea purpurea |
| increase in selfing rate |
is expected to have |
genomic impacts on individuals and populations |
|
| recent demography of Scots pine |
reconstructed |
population history |
Scots pine |
| feems analysis |
identified |
several regions with slightly reduced gene flow |
|
| (NFD6, AT2G20585) |
is within 83 kb from, and thus physically linked to, and in high LD with (r2 = 0.70) |
the potential regulatory region under selection for glyphosate resistance on Chr6.2 |
Ipomoea purpurea |
| changes in composition |
might reflect |
important shifts between the balance of mutation and drift, and hence effective population size |
|
| K = 3 |
resulted in |
Scandinavian populations formed a new cluster |
|
| strains sampled on susceptible and resistant varieties |
show |
high genetic differentiation at avrRpv3.1 locus |
Plasmopara viticola; Vitis vinifera |
| Hap-7A-3 |
occurred in |
two zones in Chinese landraces (III at 8.7% and VII at 11.1%) |
Triticum aestivum |
| polymorphic sites in TaTEF-7A promoter region |
showed |
significant linkage disequilibrium (r2=1, P<0.001) |
Triticum aestivum |
| coefficient of genetic differentiation (QST) for xylem resistance to cavitation in Pinus pinaster |
is |
low |
Pinus pinaster |
| SSLP marker within PLANT U-BOX8 (B80, PUB8, AT4G21350) 5′ sequences that distinguishes C24 from RLD/Col-0 |
was used to find that |
the PLANT U-BOX8 (B80, PUB8, AT4G21350) RLD/Col-0 allele occurs in approximately one-third of 86 accessions tested |
Arabidopsis thaliana |
| Bd21 and Bd21-3 |
were |
most similar overall, but in some genome regions they are the most divergent |
Brachypodium distachyon |
| Bd1-1-unique SNPs |
result in |
low D-statistic |
Brachypodium distachyon |
| linkage disequilibrium (LD) |
is |
one of important signatures of natural selection |
|
| additional geographic sampling of Arabidopsis thaliana |
did not alter considerably |
previously described phylogeography of Arabidopsis thaliana |
Arabidopsis thaliana |
| genetic variation expressed for xylem resistance to cavitation within natural populations of poplars |
remains poorly documented |
in studies with limited number of genotypes per population |
Populus |
| Bd1-1 |
has excess of |
Bd1-1-unique SNPs relative to pairwise differences in genome segments |
Brachypodium distachyon |
| MsT and Mf |
high levels of bi-directional gene exchanges detected between |
gene flow |
Miscanthus sinensis; Miscanthus floridulus |
| pairwise comparisons |
provided |
reliable estimate of gene flow between focal populations |
Miscanthus |
| R. canina accessions |
were collected across |
Central and Eastern Europe |
Rosa canina |
| close proximity of cost and resistance loci (< 85 kb) |
supports |
requirement that c ≪ s is not improbable |
Ipomoea purpurea |
| InDel4337-Del frequency |
is only |
temperate lines (3%) |
Zea mays |
| high selfing rate |
is due to |
genomic constraints |
|
| Tajima's D test of z2δ10 |
showed |
non-significant Tajima's D values in individual populations |
|
| 47% of North American pairs |
exhibit extensive |
haplotype sharing |
Arabidopsis thaliana |
| sparse sampling design of Triticum urartu collection |
cannot provide |
full representation of geographic structuration of Triticum urartu diversity |
Triticum urartu |
| 92% of genetic variation between lineages A and B |
was indicative of |
long history of isolation with very low levels of gene flow |
Senecio coronatus |
| fewer private alleles in lines from northern Sweden than in lines from southern Sweden |
18% versus 67% |
population divergence |
Arabidopsis thaliana |
| linkage disequilibrium characterization |
began systematic characterization of |
genome-wide polymorphism in Arabidopsis thaliana |
Arabidopsis thaliana |
| ability to detect footprints of selection |
depends greatly on |
sample composition and size |
Arabidopsis thaliana |
| two additional four-sample analyses with outgroup Arabidopsis lyrata |
produced |
similar patterns |
Arabidopsis thaliana; Arabidopsis lyrata |
| out-crossers |
have generally greater diversity than |
selfers |
|
| reduced recombination in the S-locus region |
means that |
a mutation at a modifier locus tightly linked to the self-incompatibility recognition genes is likely to have a significant impact on the distribution of S haplotypes in natural populations |
Arabidopsis thaliana |
| 6 of 26 reliably genotyped SNPs in the promoter, one SNP in the first intron (990,275) and one of the large insertions (at 987,145) |
C. rubella-like alleles were virtually absent from |
C. grandiflora |
Capsella grandiflora; Capsella rubella |
| phylogenetic analysis |
revealed that |
majority of accessions containing the 20-bp indel originated from wild or ornamental peach groups |
Prunus persica |
| genetic divergence for some loci |
may exceed neutral expectations |
neutral expectations |
Miscanthus |
| distributions of fixation index (FST) values |
showed positive skewness and excess kurtosis |
statistical distribution |
Miscanthus |
| pairwise ima 2 analyses |
were performed because |
three-population comparisons did not reach convergence |
Miscanthus |
| resistant parents heterozygous at resistance locus |
results in |
F1-population segregates 1:1 for pathogen recognition |
Solanum berthaultii; Solanum ruiz-ceballosii |
| AMOVA analysis |
revealed that |
30% of variation was between individuals within populations |
Cardamine hirsuta |
| extent of gene flow |
and allopatric intra-specific pair (MfT–MfC) |
gene flow level |
Miscanthus floridulus |
| Fu and Li tests |
are more sensitive than |
Tajima's D |
|
| KP hyperaccumulators |
grouped with |
non-accumulator serpentine populations in lineage A |
Senecio coronatus |
| genetic diversity |
decreased from YRR (π = 0.402 × 10−3) to USA region (π = 0.173 × 10−3) in |
upland cotton populations |
Gossypium hirsutum |
| genome-wide polymorphism data |
provides |
more powerful test of hypothesis that selfing lineages experience accumulation of deleterious mutations |
Capsella rubella |
| significant negative results of Fu and Li D * & F * in three populations |
confirmed |
existence of selection signals |
|
| Hap-4 |
showed |
highest frequency (85.26%) |
Glycine max |
| among-population variation in Ni hyperaccumulators |
has been reported in |
A. bertoloni |
Alyssum bertoloni |
| Within lineage A, most pairwise population ΦPT values |
were not significant at P < 0.05 and suggested |
gene flow was occurring |
Senecio coronatus |
| pattern of genetic diversity in Triticum urartu |
is consistent with |
isolation by distance model |
Triticum urartu |
| phenotypic variation |
is matched by |
significant genetic differentiation |
Senecio coronatus |
| apomictic plants |
can be analyzed with |
mixture model |
|
| population differentiation |
was little among |
four breeding periods |
Gossypium hirsutum |
| Tajima's D values of NNR and S3 |
showed substantially more positive values than |
other geographical distributions and breeding periods |
Gossypium hirsutum |
| genome-wide consequences of founder event and shift to selfing |
range to |
genome-wide decline in the efficacy of natural selection on amino acid polymorphisms |
Capsella rubella |
| effective barrier to migration due to non-equilibrium history of drift after divergence |
is illustrated by |
African elephant example |
Loxodonta africana |
| clustering on basis of genome-wide polymorphism |
revealed |
four major groups corresponding to A. thaliana, A. halleri, A. lyrata and A. arenosa |
Arabidopsis thaliana; Arabidopsis halleri; Arabidopsis lyrata; Arabidopsis arenosa |
| absence of positive or balancing selection at the RCO-A locus |
is consistent with |
the absence of common variants affecting leaf shape |
Capsella grandiflora |
| pairwise relative kinship of all samples and four main subgroups |
was |
small |
Brassica juncea |
| population bottleneck |
contributes to |
statistical bias in linkage disequilibrium determination |
Striga hermonthica |
| population genetic structure |
is one of the uncertain evolutionary forces causing |
linkage disequilibrium decay |
Striga hermonthica |
| linkage disequilibrium in C. grandiflora |
decays within |
a few hundred base pairs |
Capsella grandiflora |
| interchromosomal linkage disequilibrium (ILD) |
has been identified in |
other systems for ecologically relevant traits |
|
| regulatory regions |
show high ILD values between |
resistance alleles |
Ipomoea purpurea |
| TeM paralogs in unM-teM pairs |
showed significantly more negative |
Tajima's D values compared with its unM paralog |
Arabidopsis thaliana |
| unM translocated paralogs |
showed a slightly higher |
rate of polymorphism |
Arabidopsis thaliana |
| range-wide population genetic analyses |
conducted on |
2321 trees from 202 populations |
Scots pine |
| extensive sampling of 2321 Scots pine individuals from > 200 populations |
aimed to assess |
impact of geography, ecological conditions and gene flow on spatial patterns |
Pinus sylvestris |
| Bruxaux et al. |
quantified |
genetic variation across 123 population clusters identified from 211 natural pine stands |
Pinus sylvestris |
| gene flow from Goodyera similis on Kozu Island to Goodyera henryi × Goodyera similis |
has proportion of migrants per generation of |
0.091 |
Goodyera henryi; Goodyera similis |
| linkage disequilibrium (LD) |
estimated as |
r² (squared Pearson correlation coefficient) |
Brassica juncea |
| isozyme markers |
is used for |
S. hermonthica genetic diversity studies |
Striga hermonthica |
| local adaptation |
arises when |
genetic divergence of populations |
|
| InDel4337-Del frequency |
is higher in |
tropical inbred lines (26%) |
Zea mays |
| genotyping |
was essential to deflect |
alternative explanations such as genetic drift owing to severe population bottlenecks |
Veronica arvensis |
| inbreeding coefficient (F IS ) values |
were slightly elevated in |
northern Norway |
|
| inbreeding coefficient (F IS ) values |
were slightly elevated in |
isolated populations |
|
| tess3r |
did not identify a specific number of clusters that best explained |
genetic diversity in the population |
|
| STRUCTURE analysis |
demonstrated that insular ecotype contains |
genetic components from both Goodyera henryi and Goodyera similis |
Goodyera henryi; Goodyera similis |
| effective population size |
defines |
fate of genetic variation in populations |
|
| population-level variation |
carries information that can infer |
fine-scale characteristics of recombination based on population's natural history |
|
| epigenome-mediated polymorphism biases observed at whole-genome scales |
similar to |
duplicate paralogs that diverge in their epigenomic states also show comparable differences in polymorphism |
Arabidopsis thaliana |
| absence of reduction in genetic diversity in other locations |
could be due to |
very limited effect of genetic drift |
|
| Tajima's D |
showed no correlation with |
latitude |
|
| coalescence models |
tested |
demographic changes in three geographically distant populations found in China, Spain, and Norway |
Pinus sylvestris |
| population structure required to account for pairwise sequence divergence of several percent at individual loci |
must be far older than |
most recent glaciation |
Arabidopsis thaliana |
| North and South American alfalfa cultivars clustering |
in agreement with |
migration and cultivation history of alfalfa |
Medicago sativa |
| 2968 comparisons with kinship coefficients greater than 0.92 |
involved |
381 female lines |
Oryza sativa |
| outcrossing populations |
allow |
recessive mutations to be selected for only when they are revealed to be homozygotes and accumulated to high frequency |
Zea mays ssp. mays |
| nucleotide diversity analysis |
provides assessment of |
narrow genetic base within chickpea cultivars |
Cicer arietinum |
| 84 SNPs |
had |
44 polymorphic SNPs in entire dataset |
Cardamine hirsuta |
| (FST, LHL3, LL1, AT1G64625) value |
indicated |
strong population differentiation |
Cardamine hirsuta |
| result of paternal transmission in Rosa agrestis |
is in line with |
microsatellite data showing paternal alleles not in two copies in Rosa canina |
Rosa agrestis; Rosa canina |
| spatially varying selection along environmental gradients |
is expected to generate |
gene frequency clines at associated loci |
Pinus sylvestris |
| inbreeding |
causes |
reduced effective population sizes |
|
| rapid colonization from few isolated refugia scenario |
would predict |
lower genetic diversity in northern populations of Scots pine |
Pinus sylvestris |
| p.Ser55* mutation |
is observed in |
strains of both mating types |
Fulvia fulva |
| gbM genes |
showed the lowest |
rates of polymorphism |
Arabidopsis thaliana |
| DNA methylation difference |
examined for effect on |
rate of polymorphism between duplicate pairs |
Arabidopsis thaliana |
| shifts in base composition bias |
can be linked with |
crucial evolutionary parameters as generation time and population size |
|
| genotyping-by-sequencing |
used to analyze |
genetic structure in Scots pine |
Scots pine |
| consecutive range expansions after contraction |
may carry only a portion of the diversity from the source population |
reduced genetic diversity in expanding populations |
|
| principal component analysis (PCA) |
observed pattern congruent with |
geographic distribution |
|
| second principal component axis (PC2) |
followed |
more west–east direction for northern European, Russian and Asian populations |
|
| clustering analysis |
did not recover clear optimal number of |
clusters (K) |
|
| five other avr alleles |
represented |
8% of population with frequency varying from 0.5% to 3% |
Plasmopara viticola |
| avrRpv3.1 locus |
has |
high genetic differentiation ( (FST, LHL3, LL1, AT1G64625) = 0.58) |
Plasmopara viticola |
| hybrids between Goodyera henryi and Goodyera similis on Kozu Island |
had |
interspecific heterozygosity below 0.3 |
Goodyera henryi; Goodyera similis |
| Ipomoea purpurea populations |
show |
low genetic differentiation |
Ipomoea purpurea |
| reductions in equilibrium GC |
might reflect |
shrinking effective population sizes or increased generation times |
|
| possible demographic changes |
might interact with selection to produce |
changes in equilibrium composition |
|
| inbreeding |
causes |
homozygosity |
|
| Avr9B mutations |
are restricted to |
strains of particular mating type |
Fulvia fulva |
| Scots pine populations |
have |
near absence of inbreeding |
Pinus sylvestris |
| hybrids between Goodyera henryi and Goodyera similis on Kozu Island |
had only two samples with |
hybrid index below 0.25 |
Goodyera henryi; Goodyera similis |
| TEM genes |
showed 1.06× more polymorphism than |
unM genes |
Arabidopsis thaliana |
| inbreeding coefficient (F IS ) values |
showed general tendency for marginally higher values at |
high latitudes |
|
| tess3r results |
were very similar to |
ones obtained with NGSadmix |
|
| high selfing rate |
could have negative effect on |
long-term maintenance of populations |
|
| recombination rate (c) much lower than selection coefficient (s) |
would prevent complete decoupling of |
cost alleles from resistance alleles |
Ipomoea purpurea |
| lack of differences in Tajima's D in other pairs |
consistent with |
interactive effects of selection and mutation rate differences |
Arabidopsis thaliana |
| gbM-gbM, teM-teM, and unM-unM translocated paralogs |
examined for polymorphism rate changes in |
|
Arabidopsis thaliana |
| Scots pine |
displays |
high and uniform genetic diversity across entire range |
Scots pine |
| global F ST |
measures |
genetic differentiation in Scots pine |
Scots pine |
| Spanish and Chinese populations |
were slightly differentiated from |
rest of the sampling |
|
| native ranges |
have |
more deterministic distribution of genotypes |
|
| Avr allele |
was |
most frequent (53%) |
Plasmopara viticola |
| absence of association between SNPs in the RCO-A locus and leaf margin dissection in C. grandiflora |
together with the largely fixed phenotypic difference between the species argues that the C. rubella high-lobing allele was not captured from |
common standing variation in C. grandiflora |
Capsella grandiflora; Capsella rubella |
| No genetic variation at (AT3G24580) |
was found between |
Hpa Gw-resistant (Gw-30, Gw-31, Gw-112, Gw-127, and Gw-144) and -susceptible (Gw-16, Gw-50, Gw-107, Gw-148, and Gw-167) genotypes |
Arabidopsis thaliana |
| several comparative studies |
have shown |
lower levels of genetic isolation in wind-pollinated than in related insect-pollinated species |
|
| simple sequence repeats (SSRs) together with expressed sequence tags (EST-SSR) |
is used for |
S. hermonthica genetic diversity studies |
Striga hermonthica |
| linkage disequilibrium (r2) |
calculated between |
long-distance and interchromosomal SNPs that showed the most extreme level of differentiation and selection |
Ipomoea purpurea |
| climatic selection, geographic distance and demographic history |
contribute to |
spatial variation in allele frequencies |
|
| microsatellites and isozymes |
indicate that |
N. fusca is the most genetically distinct |
Nothofagus fusca |
| polygenic local adaptation |
can generate |
linkage disequilibrium |
Ipomoea purpurea |
| patterns in gene–tree conflict |
can be explored through |
population dynamics such as ILS and introgression |
|
| changes in magnitude of trait evolution |
can be due to |
genetic drift |
|
| changes in magnitude of trait evolution |
can be due to |
differences in selective pressures among localities |
|
| absence of reduction in genetic diversity in other locations |
could be due to |
large enough population size |
|
| Scots pine populations |
have |
low genetic differentiation with global F ST of 0.048 |
Pinus sylvestris |
| Structure analysis under Δ K method |
assigned individuals to |
two genetic clusters |
Goodyera henryi; Goodyera similis |
| hybrids between Goodyera henryi and Goodyera similis on Kozu Island |
displayed |
intermediate values for hybrid index |
Goodyera henryi; Goodyera similis |
| highly differentiated region containing seed development genes |
is linked to |
other regions under selection that harbor resistance alleles |
Ipomoea purpurea |
| DNA methylation divergence in CG, CHG, and CHH contexts |
shows significant main effects and significant interactions between the variables, except for three-way interaction |
absolute differences in the rate of polymorphism between duplicate paralogs |
Arabidopsis thaliana |
| genome-wide patterns of genetic diversity across species range |
remain scarcely studied for |
Scots pine |
Pinus sylvestris |
| Evanno method |
indicated that |
two groups explained the genetic diversity best |
|
| (anac025, NAC025, NAC25, AT1G61110) and (NFD6, AT2G20585) |
are physically linked on chromosome 6 to |
regions under selection containing serine–threonine kinase genes |
Ipomoea purpurea |
| decreased genetic diversity |
may result in |
reduced potential response to future selective pressures |
|
| extensive sampling of 2321 Scots pine individuals from > 200 populations |
aimed to assess |
whether expanding populations harbor high genetic load |
Pinus sylvestris |
| Ipomoea purpurea populations |
show |
recent genetic connectivity |
Ipomoea purpurea |
| genes that showed loss-of-function (LOF) mutations including missense and nonsense mutations in natural accessions of Arabidopsis thaliana |
show that frequency of LOF mutations showed weak positive correlation with |
frequency of teM across the population |
Arabidopsis thaliana |
| InDel4337-Ref alleles in teosinte accessions |
have been diversified |
teosinte populations |
Zea mays subsp. parviglumis |
| inbreeding coefficient (F IS ) |
averaged |
0.059 |
|
| Rates of sequence variability in natural populations |
influenced by |
both mutation rate and natural selection |
Arabidopsis thaliana |
| K = 4 |
resulted in |
component for Western Europe populations appeared |
|
| π 0 /π 4 ratio |
showed no correlation with |
Tajima's D |
|
| Whole-genome duplicates (WGDs) |
had lower |
polymorphism |
Arabidopsis thaliana |
| migration rate from Goodyera henryi × Goodyera similis to Goodyera similis |
has 95% credible interval overlapping with zero, indicating |
no significant gene flow |
Goodyera henryi; Goodyera similis |
| distinct genetic signature in extant populations |
includes |
genetic lineages that track their recent ancestry |
Pinus sylvestris |
| observed heterozygosity (H o ) and expected heterozygosity (H e ) |
showed small decrease at |
high latitudes |
|
| Scots pine |
has |
relatively low levels of genetic variation across its entire range |
Pinus sylvestris |
| teM parental paralogs switched to unM translocated paralogs |
showed lower |
rates of polymorphism |
Arabidopsis thaliana |
| major population crash |
could generate |
nonadaptive genetic differentiation via genetic drift |
Veronica arvensis |
| third and fourth principal component axes |
separated |
Scottish and Turkish/Black Sea populations |
|
| range expansions |
can lead to |
more stochastic distribution of genotypes in non-native ranges |
|
| single-nucleotide polymorphisms in the promoter of PaFTL2 |
have |
clinal variation in allele frequency |
Picea abies |
| more negative Tajima's D values in TeM paralogs |
consistent with |
elevated mutation rate or differences in the distribution of fitness effects between these genes |
Arabidopsis thaliana |
| scarcity of genome-wide patterns and landscape impact studies |
hinders |
recovery of evolutionary history and genetic signature of local adaptation |
Pinus sylvestris |
| Tajima's D with longitude |
showed higher values in |
Asia |
|
| UMAP analysis |
confirmed |
very low level of structure in the data |
|
| cultivar comparison and population-based studies |
examining associations between metabolites and/or transcripts may be confounded with |
population structure |
|
| hybrid index and interspecific heterozygosity estimates from introgress |
was consistent with |
results from phylogenetic and Structure analyses |
Goodyera henryi; Goodyera similis |
| population differentiation analysis (F ST) |
showed |
differentiation degree between three tetraploid alfalfa subpopulations was high |
Medicago sativa |
| OutcrossSeq method |
will also be robust for |
populations of insects and fishes with numerous progeny |
|
| DNA polymorphisms of multiple sweet orange cultivars |
should improve |
analysis of genome heterozygosity of sweet orange |
Citrus sinensis |
| non-significant Wilcoxon's signed-rank test |
suggests no evidence of |
recent population bottleneck |
Striga hermonthica |
| phenotypic sex ratios in natural populations |
were quantified as |
proxy for effective population size |
|
| alternate allele at ch09_70173370 |
is most abundant in |
S. pimpinellifolium accessions from Ecuador |
Solanum pimpinellifolium |
| geographic and environmental distances |
showed weak correlation |
between them |
|
| outcrossing |
reduces |
inbreeding |
|
| levels of genetic variation |
similar across |
species and populations in Miscanthus species complex |
Miscanthus |
| southern M. sinensis (MsT) and populations of M. floridulus (Mf) |
MsT closest to MfC with FST value of |
0.09 |
Miscanthus sinensis; Miscanthus floridulus |
| taxa at different elevations |
displaying |
altitudinal cline of condensatus → glaber → formosanus → transmorrisonensis |
Miscanthus sinensis |
| extent of gene flow |
followed by allopatric inter-specific pair (MsT–MfC) |
gene flow level |
Miscanthus sinensis; Miscanthus floridulus |
| Solanum berthaultii population |
segregates for |
single dominant R gene Rpi-ber2 |
Solanum berthaultii |
| genetic variation in C. hirsuta |
is structured |
geographically |
Cardamine hirsuta |
| 11 additional non-sequenced lines |
showed |
these polymorphisms distributed broadly among B. distachyon populations |
Brachypodium distachyon |
| LD statistic r2 |
calculated to distinguish |
outliers from background genes |
Miscanthus |
| GmGA2ox16-Hap1 allele |
present at frequency of |
71.17% in landraces to 78.10% in improved cultivars |
Glycine max |
| Tibet population |
has significantly lower nucleotide diversity than |
Yunnan population |
Citrus medica |
| taf4b-1 |
is |
rare mutation that likely arose in South-West Ireland |
Arabidopsis thaliana |
| populations in refugial areas |
diverge by |
drift and/or local adaptation |
|
| Mf and MsT |
lowest differentiation at species level with FST value of |
0.08 |
Miscanthus floridulus; Miscanthus sinensis |
| Bayesian-based structure program |
used to examine |
population structure in Miscanthus species complex |
Miscanthus |
| MsT and Mf |
M values estimated at 1.17 × 10^-6 from Mf to MsT |
migration rate |
Miscanthus sinensis; Miscanthus floridulus |
| 389 genes |
represents |
6.6% of genes affected by LOF variants |
Glycine max; Glycine soja |
| EM algorithm |
is implemented to estimate |
outcrossing rate |
|
| 48,518 high-quality SNPs |
were identified in |
4,225 genes |
Capsella grandiflora; Capsella rubella |
| SNPs segregating in both species |
had |
lowest nonsynonymous-to-synonymous ratio (0.22) |
Capsella grandiflora; Capsella rubella |
| analysis of molecular variance |
revealed very few variants resided among populations within species |
genetic variants |
Miscanthus |
| differentiation between (E12A11, MFT, AT1G18100) and MfC |
only detected using |
SSRS |
Miscanthus floridulus |
| MsJR to (E12A11, MFT, AT1G18100) |
significant uni-directional introgression detected from |
introgression |
Miscanthus sinensis; Miscanthus floridulus |
| Group 3 |
could be further divided into |
three subgroups highly correlated with subspecies geographic distribution |
Medicago sativa |
| confounding effects of background loci |
may be |
genome-wide due to linkage disequilibrium |
|
| SNPs |
segregated in |
both species |
Capsella grandiflora; Capsella rubella |
| deletion or absence alleles |
were more likely to be |
major alleles |
Arabidopsis thaliana |
| core germplasms |
acquired from specimens distributed over |
six continents |
Medicago sativa |
| (E12A11, MFT, AT1G18100) |
assigned to independent cluster at K ≥ 6 |
genetic cluster |
Miscanthus floridulus |
| Mf and MsJR |
M values estimated at 3.36 × 10^-9 from Mf to MsJR |
migration rate |
Miscanthus floridulus; Miscanthus sinensis |
| only a few outlier genes |
displayed |
significant LD within populations |
Miscanthus |