Genetic Structure and Population Differentiation of Tamarix chinensis in Yellow Rive Delta, China

doi:10.3724/SP.J.1143.2011.10209

Abstract

Abstract:

作为黄河三角洲关键建群物种之一，柽柳(Tamarix chinensis)在维持当地湿地生态系统平衡中起着重要作用。为更好地了解黄河三角洲柽柳居群的遗传结构和分化水平，本文利用10个ISSR分子标记，对来自三个柽柳居群的90个个体的遗传多样性进行了对比分析，结果表明：黄河三角洲的柽柳在物种水平存在较高的遗传多样性，总的多态位点百分率（P）达85%，Nei′s基因多样度(H)和Shannon′s多样性指数(I)分别为0.276和0.419；遗传变异主要存在于居群之内，居群间遗传分化程度低 (Gst=0.077, Φst=0.072)。这种遗传结构和分化格局的形成除了和柽柳的生活型、交配体系以及种子传播模式紧密相关外，可能还与其生境，特别是土壤的含盐量具有一定的关系。

Key words: Tamarix chinensis, ISSR, Genetic diversity, Soil salinity

CLC Number:

Q 16

JIANG Zhi-Min, CHEN Yu-Xia, BAO Ying. Genetic Structure and Population Differentiation of Tamarix chinensis in Yellow Rive Delta, China[J]. Plant Diversity, 2011, 33(4): 403-408.

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