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43 results for “Quercus acutissima”
Data for: Genomic vulnerability to climate change in Quercus acutissima, a dominant tree species in East Asian deciduous forests
<p><span>Understanding the evolutionary processes that shape the landscape of genetic variation and influence the response of species to future climate change is critical for biodiversity conservation. Here, we sampled </span><span>27</span><span> populations across the distribution range of a dominant forest tree, <em>Quercus</em> <em>acutissima</em>, in East Asia, and applied genome-wide analyses to track the evolutionary history and predict the fate of populations under future climate. We found two genetic groups (East and West) in <em>Q</em>. <em>acutissima</em> that diverged during the Pliocene. </span><span>We also found</span><span> a heterogeneous landscape of genomic variation in this species</span><span>, which may have been shaped by </span><span>population demography and </span><span>linked selections</span><span>.</span><span> Using genotype-environment association analyses, we identified climate-associated SNPs in a diverse set of genes and functional categories, indicating a model of polygenic adaptation in <em>Q</em>. acutissima<em>.</em> We further estimated three genetic offset metrics to quantify genomic vulnerability of this species to climate change due to the complex interplay </span><span>between</span><span> local adaptation</span><span> and</span><span> migration</span><span>.</span><span> We found that marginal populations are under </span><span>higher</span><span> risk of local extinction</span><span> because of</span><span> future climate change</span><span>, and may not be able to track </span><span>suitable habitats </span><span>to maintain the gene-environment relationships observed under the current climate.</span><span> We also detected higher reverse genetic offsets in northern China, indicating that genetic variation currently present in the whole range of <em>Q</em>. <em>acutissima</em> may not adapt to future climate conditions in this area.</span> <span>Overall, this study</span><span> illustrates how evolutionary</span><span> processes </span><span>have</span><span> shaped the landscape of genomic variation, and</span><span> provides a comprehensive genome-wide view of climate maladaptation in <em>Q</em>. <em>acutissima</em>.</span></p>
Data for: Genomic vulnerability to climate change in Quercus acutissima, a dominant tree species in East Asian deciduous forests
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Quercus acutissima (Fagaceae) - fruit - as borne on the plant
Image of Quercus acutissima (Fagaceae) - fruit - as borne on the plant
Quercus acutissima (Fagaceae) - whole tree (or vine) - general
Image of Quercus acutissima (Fagaceae) - whole tree (or vine) - general
Quercus acutissima (Fagaceae) - bark - of a medium tree or large branch
Image of Quercus acutissima (Fagaceae) - bark - of a medium tree or large branch
Quercus acutissima (Fagaceae) - twig - orientation of petioles
Image of Quercus acutissima (Fagaceae) - twig - orientation of petioles
Quercus acutissima (Fagaceae) - leaf - margin of upper + lower surface
Image of Quercus acutissima (Fagaceae) - leaf - margin of upper + lower surface
Quercus acutissima (Fagaceae) - twig - close-up winter terminal bud
Image of Quercus acutissima (Fagaceae) - twig - close-up winter terminal bud
Quercus acutissima (Fagaceae) - leaf - margin of upper + lower surface
Image of Quercus acutissima (Fagaceae) - leaf - margin of upper + lower surface
Quercus acutissima (Fagaceae) - leaf - whole upper surface
Image of Quercus acutissima (Fagaceae) - leaf - whole upper surface
Quercus acutissima (Fagaceae) - leaf - whole upper surface
Image of Quercus acutissima (Fagaceae) - leaf - whole upper surface
Quercus acutissima (Fagaceae) - leaf - showing orientation on twig
Image of Quercus acutissima (Fagaceae) - leaf - showing orientation on twig
Quercus acutissima (Fagaceae) - fruit - lateral or general close-up
Image of Quercus acutissima (Fagaceae) - fruit - lateral or general close-up
Genotype data of 10 nuclear microsatellite loci for 30 Quercus acutissima populations in China
<p>This dataset includes genotype data of 10 nuclear microsatellite loci for 707 individuals of Quercus acutissima from 30 natural populations in China.</p>
nSSR genotype data for 30 Quercus acutissima populations and 18 Quercus chenii populations in China
<p>This dataset includes genotype data of seven nSSR loci for 696 individuals of Quercus acutissima from 30 natural populations, and 415 individuals of Quercus chenii from 18 natural populations in China.</p>
Combined genotype and phenotype analyses reveal patterns of genomic adaptation to local environments in the subtropical oak Quercus acutissima
Understanding the effects of the demographic dynamics and environmental heterogeneity on the genomic variation of forest species is important not only for uncovering the evolutionary history of the species but also for predicting their ability to adapt to climate change. In this study, we combined a common garden experiment with range-wide population genomics analyses to infer the demographic history and characterize patterns of local adaptation in a subtropical oak species, Quercus acutissima. We scanned about 8% of the oak genome using a balanced representation of both genic and non-genic regions and identified a total of 55,361 SNPs in 167 trees. Genomic diversity analyses revealed an east-west split in the species distribution range. Coalescent-based model simulations inferred a late Pleistocene divergence in Q. acutissima between the east and west groups as well as subsequent pre-glaciation population expansion events. Consistent with observed genetic differentiation, morphological traits also showed east-west differentiation and the biomass allocation in seedlings was significantly associated with precipitation. Environment was found to have a significant and stronger impact on the non-neutral than the neutral SNPs, and also significantly associated with the phenotypic differentiation, suggesting that apart from the geography, environment had played a role in determining non-neutral and phenotypic variation. Our approach, which combined a common garden experiment with landscape genomics data, validated the hypothesis of local adaptation of this long-lived oak tree of subtropical China. Our study joins the small number of studies that have combined genotypic and phenotypic data to detect patterns of local adaptation.
Combined genotype and phenotype analyses reveal patterns of genomic adaptation to local environments in the subtropical oak Quercus acutissima
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FIGURES 15–19 in A new species of Lyctocoridae (Hemiptera: Heteroptera: Cimicoidea) feeding on the exuded sap of Sawtooth Oak, Quercus acutissima, in Japan
FIGURES 15–19. Male (15–18) and female (19) genitalia of Lyctocoris ichikawai sp. nov., paratypes. 15, pygophore with parameres (phallobase omitted), dorsal view; 16, left paramere, dorsal view; 17, right paramere, dorsal view; 18, phallobase; 19, genital apophysis, dorsal view. Scales: 0.1 mm.
FIGURE 20–22 in A new species of Lyctocoridae (Hemiptera: Heteroptera: Cimicoidea) feeding on the exuded sap of Sawtooth Oak, Quercus acutissima, in Japan
FIGURE 20–22. Live images of Lyctocoris ichikawai sp. nov. 20, habitus, 3, paratype; 21, adult sucking the exuded sap of Quercus acutissima; 22, final instar sucking the exuded sap of Q. acutissima.
FIGURES 10–14 in A new species of Lyctocoridae (Hemiptera: Heteroptera: Cimicoidea) feeding on the exuded sap of Sawtooth Oak, Quercus acutissima, in Japan
FIGURES 10–14. Lyctocoris ichikawai sp. nov., 3, paratypes. 10, head and pronotum; 11, right fore wing; 12, right fore leg; 13, right mid leg; 14, right hind leg. Scales: 0.5 mm for 10, 11; 0.2 mm for 12–14.
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OpenNeuro
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