Genomic signals reveal past evolutionary dynamics of Quercus schottkyana and its response to future climate change,Journal of Systematics and Evolution

当前位置： X-MOL 学术 › J. Syst. Evol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Genomic signals reveal past evolutionary dynamics of Quercus schottkyana and its response to future climate change
Journal of Systematics and Evolution ( IF 3.4 ) Pub Date : 2020-11-09 , DOI: 10.1111/jse.12703
Xiao‐Long Jiang _{1,

2} , Zhi‐Hao Su ₃ , Gang‐Biao Xu ₂ , Min Deng _{1,

4}

Affiliation

Understanding the past and future evolutionary dynamics of dominant species in a forest is important for guiding decisions for biodiversity conservation, forest management, and vegetation restoration. This study used Quercus schottkyana, a dominant tree in subtropical evergreen broad-leaved forests in southwest China, to investigate the influences of past environmental fluctuations and future changes in climate on the dynamics of tree demographics. Genomic data were obtained for 133 samples of Q. schottkyana from 22 populations using double-digest genotyping by sequencing. The single-nucleotide polymorphisms in the genome showed a uniform distribution. Based on principal component analysis and Admixture analysis, two distinct lineages and one mixed group were identified that corresponded to their geographical distribution. Approximate Bayesian computation analyses provided evidence that the divergence among Q. schottkyana populations could be driven by the collision between the Asian and Indian plates during the Miocene, and that climatic fluctuations in the late Pleistocene led to the introgression. The analysis of genotype-environment relationships showed that annual precipitation and geographic distance were associated with spatial genetic variation. Populations of Q. schottkyana in the northern area of the Jinsha River basin were predicted to be the most vulnerable to future climate change. To increase genetic diversity in the northern Jinsha River basin and to buffer threats from future climate change, managers could use a mixture of local and alien seeds during forest restoration and management. This case study can promote further investigations into assessing how past and future climate change impacts genetic divergence and local adaptation of trees in forests.

更新日期：2020-11-09

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11