Population genetics and breeding system of Tupistra pingbianensis (Liliaceae),a naturally rare plant endemic to SW China

查看全文 作　　者：Qin [1,2]QIAO;Chang-Qin [1]ZHANG;Richard Ian [3]MILNE

机构地区：[1]Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China;[2]Graduate School of Chinese Academy of Sciences, Beijing 100049, China;[3]Division of Environmental and Evolutionary Biology, School of Biology, University of St. Andrews, St. Andrews, Fife KY169TH, UK

出　　处：《Journal of Systematics and Evolution》索引2010年第48卷第1期,共11页

基　　金：Supported by the National Natural Science Foundation of China(Grant No. 30770139);Forest Science and Technology Support Plan,China (Grant No. 2006BAD01A1806);Yunnan Natural Science Foundation (Grant No.2009DD001) 摘　　要：The levels and partitioning of genetic diversity and inbreeding depression were investigated in Tupistra pingbianensis,a narrow endemic of southeast Yunnan,China,characterized by a naturally fragmented distribution due to extreme specialization on a rare habitat type.Here genetic diversity and patterns of genetic variation within and among 11 populations were analyzed using amplified fragment length polymorphism markers with 97 individuals across its whole geographical range.High levels of genetic variation were revealed both at the species level(P 99 = 96.012%;H t = 0.302) and at the population level(P 99 = 51.41%;H s = 0.224).Strong genetic differentiation among populations was also detected(F ST = 0.2961;θⅡ = 0.281),which corresponded to results reported for typical animal-pollinated,mixed selfing,and outcrossing plant species.This result was consistent with mating patterns detected by our pollination experiments.The indirect estimate of gene flow based on θⅡ was low(N m = 0.64).Special habitat and its life history traits might play an important role in shaping the genetic diversity and the genetic structure of this species.A pollination experiment also failed to detect significant inbreeding depression upon F 1 fruit set,seed weight,and germinate rate fitness-traits.As a naturally rare species,T.pingbianensis is not seriously genetically impoverished and likely to have adapted to tolerating a high level of inbreeding early in its history,we propose this species need only periodic monitoring to ensure their continued persistence,but not intervention to remain viable. 关键词：自然稀有植物中国人口百合科遗传学遗传变异规律遗传多样性

相关文献

参考文献（55）
引证文献（3）
耦合文献（8）

参考文献(55)

引证文献(3)

耦合文献(8)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Population genetics and breeding system of Tupistra pingbianensis (Liliaceae),a naturally rare plant endemic to SW China

参考文献(55)

引证文献(3)

耦合文献(8)

用户提示