文献类型：期刊文献

英文题名：Populus cathayana genome and population resequencing provide insights into its evolution and adaptation

作者：Xiang, Xiaodong[1,2] Zhou, Xinglu[1,2] Zi, Hailing[3] Wei, Hantian[1] Cao, Demei[1] Zhang, Yahong[1] Zhang, Lei[1,2] Hu, Jianjun[1,2]

第一作者：Xiang, Xiaodong

通信作者：Zhang, L[1];Hu, JJ[1];Zhang, L[2];Hu, JJ[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat,Natl Forestry &, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Jiangsu, Peoples R China;[3]Novogene Bioinformat Inst, Beijing 100083, Peoples R China

年份：2024

卷号：11

期号：1

外文期刊名：HORTICULTURE RESEARCH

收录：;Scopus(收录号：2-s2.0-85183899331);WOS:【SCI-EXPANDED(收录号:WOS:001148474800002)】；

基金：This work was supported by the National Key Research and Development Program of China (2021YFD2200201), the Major Project of Agricultural Biological Breeding (2022ZD04015), and the National Nonprofit Institute Research Grant of Chinese Academy of Forestry (CAFYBB2017ZY008).

语种：英文

摘要：Populus cathayana Rehder, an indigenous poplar species of ecological and economic importance, is widely distributed in a high-elevation range from southwest to northeast China. Further development of this species as a sustainable poplar resource has been hindered by a lack of genome information the at the population level. Here, we produced a chromosome-level genome assembly of P. cathayana, covering 406.55 Mb (scaffold N50 = 20.86 Mb) and consisting of 19 chromosomes, with 35 977 protein-coding genes. Subsequently, we made a genomic variation atlas of 438 wild individuals covering 36 representative geographic areas of P. cathayana, which were divided into four geographic groups. It was inferred that the Northwest China regions served as the genetic diversity centers and a population bottleneck happened during the history of P. cathayana. By genotype-environment association analysis, 947 environment-association loci were significantly associated with temperature, solar radiation, precipitation, and altitude variables. We identified local adaptation genes involved in DNA repair and UV radiation response, among which UVR8, HY5, and CUL4 had key roles in high-altitude adaptation of P. cathayana. Predictions of adaptive potential under future climate conditions showed that P. cathayana populations in areas with drastic climate change were anticipated to have greater maladaptation risk. These results provide comprehensive insights for understanding wild poplar evolution and optimizing adaptive potential in molecular breeding.