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首页> 外文期刊>Genetic Resources and Crop Evolution >Population structure and genetic differentiation among the USDA commonTI Population structure and genetic differentiation among the USDA common bean (Phaseolus vulgaris L.) core collection
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Population structure and genetic differentiation among the USDA commonTI Population structure and genetic differentiation among the USDA common bean (Phaseolus vulgaris L.) core collection

机译：USDA commonTI之间的种群结构和遗传分化USDA common bean（Phaseolus vulgaris L.）核心种群之间的种群结构和遗传分化

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摘要

Genetic diversity data were collected from a large population of common bean (Phaseolus vulgaris L.) landraces representing the United States Department of Agriculture core collection. The data were based on microsatellite data from all linkage groups. A procedure was developed to determine if we collected sufficient marker data to adequately estimated pairwise diversity. The diversity data were used to define populations using distance and model-based approaches. Genetic differentiation and genetic isolation by distance data were collected. Diversity was also compared for markers linked and unlinked to domestication loci. Using a model-based approach, the landraces were divided into the traditional Middle American and Andean gene pools. Diversity was greater for the Middle American gene pool. Six Middle American and three Andean subpopulations were defined, and the Middle American subpopulations exhibited strong geographic identity. Unlike other studies, seed size varied considerably with subpopulations, and a number of the subpopulations contained landraces from multiple common bean races. All of the subpopulations were highly differentiated, with the Middle American subpopulations showing the greatest differentiation. Genetic isolation by distance was observed among the Middle American and Andean subpopulations but not among subpopulations within a gene pool. Within each gene pool, diversity was lower for markers linked to domestication loci.
机译：遗传多样性数据是从代表美国农业部核心收藏的大量普通豆（菜豆）种中收集的。数据基于所有链接组的微卫星数据。开发了一种程序来确定我们是否收集了足够的标记数据以充分估计成对的多样性。多样性数据用于基于距离和基于模型的方法来定义种群。通过距离数据收集遗传分化和遗传隔离。还比较了与驯化基因座相关和不相关的标记的多样性。使用基于模型的方法，将地方品种分为传统的中美洲和安第斯基因库。中美洲基因库的多样性更大。定义了六个中美洲和三个安第斯亚种群，并且中美洲亚种群表现出强大的地理特征。与其他研究不同，种子大小随亚群而变化很大，并且许多亚群包含来自多个普通豆种的地方品种。所有的亚群都高度分化，而中亚亚群则表现出最大的分化。在中美洲和安第斯亚人群中观察到按距离的遗传隔离，而在基因库内的亚人群之间未观察到。在每个基因库中，与驯化基因座相关的标记的多样性较低。

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