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首页> 外文期刊>Biochemical Systematics and Ecology >Genetic diversity and population structure of the endangered species Psammosilene tunicoides revealed by DALP analysis
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Genetic diversity and population structure of the endangered species Psammosilene tunicoides revealed by DALP analysis

机译：DALP分析揭示濒危物种Psammosilene tunicoides的遗传多样性和种群结构

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摘要

Psammosilene tunicoides W. C. Wu et C.Y. Wu (Caryophyllaceae) is a rare plant endemic to China. We used the direct amplification of length polymorphism (DALP) method to analyse the genetic diversity of 17 natural populations of this species from Yunnan, Sichuan and Guizhou provinces. The percentage of polymorphic bands (PPB) was 99.1% at the species level and 19.9% at the population level. The total genetic diversity (Ht) was 0.2827: the genetic diversity within populations (H-s) was 0.0594 and the coefficient of gene differentiation (G(st)) was 0.7899. The results indicated low levels of genetic diversity within populations and extremely high genetic differentiation among populations. This pattern might be caused by genetic drift resulting from intensive harvesting and habitat fragmentation. It might also be a result of local adaptation. We further performed experiments on its breeding system and found a high rate of selfing in P. tunicoides, which may be partially responsible for its population structure
机译：Psammosilene tunicoides W.C.Wu等。吴（石竹科）是中国特有的稀有植物。我们使用长度多态性的直接扩增（DALP）方法分析了该种来自云南，四川和贵州省的17个自然种群的遗传多样性。在物种水平上，多态性带（PPB）的百分比为99.1％，在种群水平上为19.9％。总遗传多样性（Ht）为0.2827：种群内遗传多样性（H-s）为0.0594，基因分化系数（G（st））为0.7899。结果表明种群内遗传多样性水平较低，种群间遗传分化程度极高。这种模式可能是由于集约化和栖息地破碎导致的遗传漂移所致。这也可能是本地适应的结果。我们对它的繁殖系统进行了进一步的实验，发现在P. tunicoides中自交率很高，这可能部分归因于其种群结构

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