Phylogeography of an alpine plant （Bupleurum smithii, Apiaceae） endemic to the Qinghai-Tibetan Plateau and adjacent regions inferred from chloroplast DNA sequence variation  

作　　者：Cai ZHAO Xiang-Guang MA Qian-Long LIANG Chang-Bao WANG Xing-Jin HE 

机构地区：[1]Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China

出　　处：《Journal of Systematics and Evolution》2013年第4期382-395,共14页植物分类学报（英文版）

基　　金：Acknowledgements This research was financially supported by the National Natural Science Foundation of China （Grant Nos. 31270241, 31070166, 31100161）, the Doctoral Fund of the Ministry of Education of China （Grant No. 20090181110064）, the Basic Research Program from the Ministry of Science and Technology of China （Grant No. 2007FYl10100）, and by the Specimen Platform of China, Teaching Specimens Sub-platform （ht-tp：//mnh.scu.edu.cn/）. The authors thank Chun-jing ZHOU, Dr. Xue-Mei ZHANG, Zhi- Xing WANG, Jin-Bo TAN, and Yun-Dong GAO for help in fieldwork. The authors thank the editor and two anonymous reviewers for their helpful comments on earlier and present drafts of this manuscript.

摘　　要：To obtain a better understanding of how Quatemary climatic oscillations influenced range distributions and intraspecific split of alpine plants on the Qinghai-Tibetan Plateau （QTP） and in adjacent regions, we investigated the extant phylogeographical strncture of Bupleurum smithii in this area based on 22 populations and 103 individuals spanning the entire distribution region of this species using chloroplast DNA sequences. Two major haplotype lineages were identified, and at least two corresponding glacial refugia maintaining in the northeastern and eastem edge of the QTP during the Last Glacial Maximum were revealed. Secondary contact between populations and efficient gene flow were also found between two major haplotype lineages. In addition, based on the geographic distribution of haplotypes, we found that populations on the platform derived from individuals that recolonized this area from refugia situated at the northeastern and eastern edges of the QTP, and that B. smithii recolonized from southem to northern China during inter- and post-glacial periods.To obtain a better understanding of how Quatemary climatic oscillations influenced range distributions and intraspecific split of alpine plants on the Qinghai-Tibetan Plateau （QTP） and in adjacent regions, we investigated the extant phylogeographical strncture of Bupleurum smithii in this area based on 22 populations and 103 individuals spanning the entire distribution region of this species using chloroplast DNA sequences. Two major haplotype lineages were identified, and at least two corresponding glacial refugia maintaining in the northeastern and eastem edge of the QTP during the Last Glacial Maximum were revealed. Secondary contact between populations and efficient gene flow were also found between two major haplotype lineages. In addition, based on the geographic distribution of haplotypes, we found that populations on the platform derived from individuals that recolonized this area from refugia situated at the northeastern and eastern edges of the QTP, and that B. smithii recolonized from southem to northern China during inter- and post-glacial periods.

关 键 词：Bupleurum smithii PHYLOGEOGRAPHY Quaternary climatic oscillation Qinghai-Tibetan Plateau. 

分 类 号：Q945.11[生物学—植物学] S512.101[农业科学—作物学]