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Low genetic diversity and high genetic differentiation in the critically endangered Omphalogramma souliei （Primulaceae）： implications for its conservation

ISSN号：1674-4918
期刊名称：《植物分类学报：英文版》
时间：0
分类：Q943[生物学—植物学] S635.1[农业科学—蔬菜学;农业科学—园艺学]
作者机构：[1]Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China
相关基金：Acknowledgements We thank Dr. Lian-Ming GAO and Prof. Chun-Lin LONG for valuable comments on an earlier version of the manuscript. We also thank Dr. Hong-Tao LI for assistance in data analysis. We are indebted to Prof. Tzen-Yuh CHIANG and Dr. Yu-Chung CHIANG for their valuable suggestions on the manuscript. This research was supported by the National Basic Research Program of China （973 program, Grant No. 2007CB411600）, the Yunnan Provincial Natural Science Foundation （Grant No. 2005C0051M） and the National Natural Science Foundation of China （Grant No. 30571137）.

作者： Yuan HUANG Chang-Qin ZHANG De-Zhu LI[1]

关键词：遗传多样性分析, 遗传分化, 濒危物种, 信息保护, 报春花科, 多年生草本植物, ISSR标记, 遗传变异, genetic differentiation, genetic diversity, ISSR markers, mating system, Omphalogramma souliei.

中文摘要：

Omphalogramma souliei Franch。危及的长期的植物仅仅在 SW 中国的高山的区域散布了。ISSR 标记被使用决定基因变化和 O 的三张人口的 60 个个人的基因结构。在 NW 云南的 souliei，中国。在种类水平的基因差异与 P=42.5%( 多态的乐队的百分比) 和 Hsp=0.1762 (全部的基因差异) 是低的。然而，在人口之中的基因区别的高水平基于不同措施被检测(Nei 的基因差异分析：Gst=0.6038；AMOVA 分析：Fst=0.6797 ) 。在在人口之中的人口和重要基因区别以内的基因差异的底层可能由于支配的异株异花受精和自花受精在 O 在起了一个助理作用的混合交配系统。souliei。基因飘移也由于小人口尺寸和有限当前的基因流动导致了重要基因区别。对基因变化的评价和危及的种类的区别在一个基因基础上为保存提供重要信息。为这稀罕的地方性的种的保存策略被建议。

英文摘要：

Omphalogramma souliei Franch. is an endangered perennial herb only distributed in alpine areas of SW China. ISSR markers were applied to determine the genetic variation and genetic structure of 60 individuals of three populations of O. souliei in NW Yunnan, China. The genetic diversity at the species level is low with P=42.5% （percentage of polymorphic bands） and Hsp=0.1762 （total genetic diversity）. However, a high level of genetic differentiation among populations was detected based on different measures （Nei＇s genetic diversity analysis： Gst=0.6038; AMOVA analysis： Fst=0.6797）. Low level of genetic diversity within populations and significant genetic differentiation among populations might be due to the mixed mating system in which xenogamy predominated and autogamy played an assistant role in O. souliei. The genetic drift due to small population size and limited current gene flow also resulted in significant genetic differentiation. The assessment of genetic variation and differentiation of the endangered species provides important information for conservation on a genetic basis. Conservation strategies for this rare endemic species are proposed.

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