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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic structure of Lima bean (Phaseolus lunatus L.) landraces grown in the Mayan area
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Genetic structure of Lima bean (Phaseolus lunatus L.) landraces grown in the Mayan area

机译：玛雅地区种植的Lima Bean（Phaveolus Lunatus L.）Landraces的遗传结构

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Lima bean (Phaseolus lunatus L.) is an important crop in the Mayan culture. The Mayan area, considered as a main center of Mesoamerican diversity, has been divided into two subareas: the Mayan lowlands and the Mayan highlands. The Yucatan Peninsula is part of the Mayan lowlands and holds the highest number of Lima bean landraces of Mexico, but Lima beans are in high risk of genetic erosion due to intensification of the traditional Mayan agriculture. However, information on genetic diversity of Lima beans of the Mayan highlands is lacking. By using 46 landraces collected in the Mayan area (23 from each subarea) and 73 ISSR loci (inter-simple sequence repeats), we analyzed the structure, diversity and genetic relationships of Lima beans of this part of Mesoamerica. High levels of diversity (H (BAY) = 0.45) and genetic structure (F (ST) = 0.66) were found for the whole Mayan area. Genetic diversity in the Mayan lowlands was apparently higher than the Mayan highlands (H (BAY) = 0.44 and 0.36, respectively); but differences were not statistically significant. Genetic structure between the subareas was high (AMOVA = 30% of total variation), most landraces grouping according to their geographic origin. This study shows the importance of the Mayan culture in the diversification and conservation of Lima beans. The results provide important information that should be considered when implementing strategies to collect Lima bean landraces and planning in situ and ex situ programs to conserve these landraces in the Mayan region.
机译：Lima Bean（phoudolus lunatus l.）是玛雅文化中的重要作物。被认为是Mesoamerican多样性的主要中心的玛雅地区被分为两个蛛网：玛雅低地和玛雅高地。尤卡坦半岛是玛雅·低地的一部分，拥有墨西哥的最多利马豆样式，但利马豆由于传统的玛雅农业而导致的遗传侵蚀风险很高。然而，缺乏有关玛雅高原的利马豆遗传多样性的信息。通过使用在玛雅地区（来自每个蛛网的23个）和73个ISSR基因座（简单序列重复）中收集的46个地区，我们分析了Mesoamerica这部分利马豆的结构，多样性和遗传关系。为整个玛雅地区发现高水平的多样性（H（托架）= 0.45）和遗传结构（F（ST）= 0.66）。玛雅低地的遗传多样性显然高于玛雅高地（H（湾）= 0.44和0.36）;但差异没有统计学意义。蛛网中的遗传结构高（Amova =总变化的30％），大多数样机根据其地理来源分组。本研究表明玛雅文化在利马豆的多样化和保护中的重要性。结果提供了重要信息，应当在实施策略时应考虑，以便收集利马豆立群地区的战略，并以原地和原地方案规划，以保护玛雅地区的这些实地。

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