文献类型：期刊文献

英文题名：A Genomic Quantitative Study on the Contribution of the Ancestral-State Bases Relative to Derived Bases in the Divergence and Local Adaptation of Populus davidiana

作者：Zhao, Dandan[1] Zhang, Jianguo[1,2] Hui, Nan[1] Wang, Li[1] Tian, Yang[1] Ni, Wanning[1] Long, Jinhua[1] Jiang, Li[1] Li, Yi[1] Diao, Songfeng[1] Li, Jinhua[1] Tembrock, Luke R. R.[3] Wu, Zhiqiang[4] Wang, Zhaoshan[1,2]

第一作者：Zhao, Dandan

通信作者：Wang, ZS[1];Wang, ZS[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Silviculture State Forestry Adm, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable, Forestry Southern China, Nanjing 210037, Peoples R China;[3]Colorado State Univ, Dept Agr Biol, Ft Collins, CO 80523 USA;[4]Chinese Acad Agr Sci, Genome Anal Lab, Guangdong Lab Lingnan Modern Agr, Shenzhen Branch,Minist Agr,Agr Genom Inst Shenzhen, Shenzhen 518120, Peoples R China

年份：2023

卷号：14

期号：4

外文期刊名：GENES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000984051000001)】；

基金：This work was supported by two grants from the Fundamental Research Funds of the Chinese Academy of Forestry (ZDRIF201902) and the National Natural Science Foundation of China (No. 31770702). The authors declare no competing financial interests.

语种：英文

外文关键词：whole-genome re-sequencing; ancestral-state base (ASB); derived base (DB); linked selection; demographic histories

摘要：Identifying alleles associated with adaptation to new environments will advance our understanding of evolution from the molecular level. Previous studies have found that the Populus davidiana southwest population in East Asia has differentiated from other populations in the range. We aimed to evaluate the contributions of the ancestral-state bases (ASBs) relative to derived bases (DBs) in the local adaptation of P. davidiana in the Yunnan-Guizhou Plateau from a quantitative perspective using whole-genome re-sequencing data from 90 P. davidiana samples from three regions across the species range. Our results showed that the uplift of the Qinghai-Tibet Plateau during the Neogene and associated climate fluctuations during the Middle Pleistocene were likely an important factor in the early divergence of P. davidiana. Highly differentiated genomic regions between populations were inferred to have undergone strong linked natural selection, and ASBs are the chief means by which populations of P. davidiana adapt to novel environmental conditions; however, when adapting to regions with high environmental differences relative to the ancestral range, the proportion of DBs was significantly higher than that of background regions, as ASBs are insufficient to cope with these environments. Finally, a number of genes were identified in the outlier region.