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Characterization of genetic diversity and structures in natural Glycine tomentella populations on the southeast islands of China

机译：中国东南岛屿天然甘氨酸特异性群体遗传多样性及结构的特征

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摘要

Glycine tomentella Hayata is a species of Glycine Willd. subgenus Glycine, and in China it is distributed along the southeast coast. In this study, 11 natural G. tomentella populations were collected and their genetic diversity levels and population structures were analyzed using 25 simple sequence repeat (SSR) markers. The number of alleles per locus averaged 7.16 and ranged from 2 to 17. The expected heterozygosity (H-e) per locus averaged 0.60, varying from 0.19 to 0.86. The G. tomentella populations on these Chinese islands showed a greater average genetic variation (60.96%) among populations and gene differentiation index (G(st)=0.607), and a lower average within-population genetic variation (33.47%) and gene flow (N-m=0.162). In this study, these G. tomentella island populations were characterized by a relatively greater average multilocus outcrossing rate of 5.74%, which may the result of heterogeneity owing to the perennation of G. tomentella. A spatial autocorrelation analysis revealed that populations within a radius of approximately 30.45km had positive and significant genetic relationships. The Neighbor-Joining (NJ) and STRUCTURE analyses strongly showed a pattern of island differentiation' for the populations on southeast islands of China and also suggested that some genetic interconnection occurred along the southeast coast of China. The F-statistics suggested that geographically different G. tomentella populations had specific population structures. We propose that when collecting this species as a genetic resource, every G. tomentella population should be sampled.
机译：Glycine Tomentella Hayata是一种甘氨酸Willd的物种。血糖甘氨酸，在中国，它沿着东南海岸分发。在本研究中，收集了11种天然G. Tomentella群体，并使用25个简单的序列重复（SSR）标记分析其遗传多样性水平和群体结构。每个基因座的等位基因数量平均为7.16，范围为2至17.每个基因座的预期杂合性（H-E）平均为0.60，从0.19到0.86变化。这些中国群岛的G. Tomentella群体在群体和基因分化指数（G（ST）= 0.607）中显示出更大的平均遗传变异（60.96％），群体内平均遗传变异（33.47％）和基因流动（nm = 0.162）。在这项研究中，这些G.Tomentella岛群体的特征在于相对较大的平均多层折射率为5.74％，这可能由于G. Tomentella的常态而导致异质性。空间自相关分析显示，半径约为30.45km的群体具有积极和显着的遗传关系。邻近（NJ）和结构分析强烈展示了中国东南岛人口的岛屿差异化的模式，并建议发生一些遗传互连沿中国东南沿岸发生。 F统计建议地理位置不同的G. Tomentella群体具有特定的人口结构。我们建议将该物种作为遗传资源收集，每个G. Tomentella人口都应采样。

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