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

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文摘 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_8= 0.224). Strong genetic differentiation among populations was also detected (F_(ST)= 0.2961; θ~Ⅱ= 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 θ~Ⅱwas 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.
来源 Journal of Systematics and Evolution ,2010,48(1):47-57 【核心库】
DOI 10.1111/j.1759-6831.2009.00064.x
关键词 AFLP, genetic diversity, genetic structure, inbreeding depression, naturally rare plants, Tupistra ping-bianensis.
地址

1. Kunming Institute of Botany, Chinese Academy of Sciences, Yunnan, Kunming , China, 650204  

2. Division of Environmental and Evolutionary Biology, School of Biology, University of St. Andrews, UK

语种 英文
文献类型 研究性论文
ISSN 1674-4918
学科 植物学
基金 国家自然科学基金 ;  Forest Science and Technology Support Plan, China ;  云南省自然科学基金
文献收藏号 CSCD:3822218

参考文献 共 55 共3页

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引证文献 1

1 胡世俊 重庆特有植物缙云卫矛濒危原因研究进展 重庆师范大学学报. 自然科学版,2013,30(3):35-39
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