Analysis of genetic diversity and prediction of Larix species distribution in the Qinghai–Tibet Plateau,China  

作　　者：Qiqiang Guo Huie Li Weilie Zheng Jinwen Pan Jie Lu Jiangrong Li Yu Zheng 

机构地区：[1]Institute for Forest Resources&Environment of Guizhou,Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province,Guizhou University,Guiyang 550025,People’s Republic of China [2]College of Forestry,Guizhou University,Guiyang 550025,People’s Republic of China [3]College of Agriculture,Guizhou University,Guiyang 550025,People’s Republic of China [4]Institute of Tibet Plateau Ecology,Tibet Agriculture and Animal Husbandry University,Nyingchi Tibet 860000,People’s Republic of China [5]Key Laboratory of Forest Ecology in Tibet Plateau(Tibet Agriculture and Animal Husbandry University),Ministry of Education,Nyingchi Tibet 860000,People’s Republic of China [6]Plant Research Center,Chengdu Botanical Garden,Chengdu 610083,People’s Republic of China

出　　处：《Journal of Forestry Research》2023年第3期705-715,共11页林业研究（英文版）

基　　金：supported by the National Natural Science Foundation of China (31660215);Major Scientific and Technological Projects of Guizhou Province ([2018]5261),China;the Construction Project for First-Class Ecology Discipline in Guizhou (GNYL [2017] 007),China;the China Scholarship Council ([2021]15)

摘　　要：Larix resources in the Qinghai-Tibet Plateau have important ecological and economic values.However,the lack of genetic diversity background and related research hinders the development of conservation strategies.In this study,genetic diversity and distribution of fi ve Larix species were investigated.Using 19 polymorphic microsatellite markers to study 272 representative individuals from 13 populations,the results show low genetic diversity at the population level,with variation explained mainly by diff erentiation among populations.The Larix populations were classifi ed into two clades,one formed by eight populations,including three of the species in this study,L.kongboensis,L.speciosa,and L.potaninii var.australis.The other clade consists of fi ve populations,including the other two species in this study,L.griffi thii and L.himalaica.Genetic distance of the species was aff ected by geographical isolation and genetic diversity was mainly aff ected by altitude.The area suitable for Larix spp.decreased during the Last Glacial Maximum compared to the current distribution according to the niche model,but should increase in future climate scenarios(2050s),expanding westward along the Himalayas.These results provide an important scientifi c basis for the development of conservation strategies and further the sustainable utilization of Larix resources in the Qinghai-Tibet Plateau.

关 键 词：Larix spp. Genetic diversity Phylogenetic relationship Genetic structure Ecological niche modeling Qinghai-Tibet Plateau 

分 类 号：S791.22[农业科学—林木遗传育种]