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首页> 外文期刊>Journal of arid environments >Population Genetics And Process Of Domestication Of Stenocereus Pruinosus (cactaceae) In The Tehuacan Valley, Mexico
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Population Genetics And Process Of Domestication Of Stenocereus Pruinosus (cactaceae) In The Tehuacan Valley, Mexico

机译：墨西哥Tehuacan谷中食肉单胞菌的种群遗传学和驯化过程

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摘要

Population genetics of wild, managed in situ and cultivated populations of Stenocereus pruinosus coexisting in Central Mexico were studied. We hypothesized that artificial selection decreases genetic diversity in managed populations and influences differentiation of populations depending on the amount of gene flow. Nine wild, managed in situ and cultivated populations (264 individual plants) were studied through isozyme analysis (10 loci). Genetic variation of S. pruinosus is the highest reported in columnar cacti species (e.g. H_T = 0.592). Genetic variation in cultivated populations (Ho = 0.611, He = 0.588) was slightly higher than in wild (Ho = 0.556, He = 0.583) and managed in situ populations (Ho = 0.536, He = 0.578), but differences were not significant. Most of the genetic variation occurred within populations, with low differentiation and high gene flow among all populations (F_(ST)= 0.064, Nm_(FST) = 3.659 and Nm_(GST) = 3.803 in average) associated to bat pollination, seed dispersal by birds and transportation of vegetative propagules by people. Genetic distances were not correlated with geographic distances and in most cases are lower between similarly managed populations. Managed in situ and cultivated populations are important reservoirs of genetic diversity of this species to be considered in conservation programs.
机译：研究了在墨西哥中部共存的野生，定居和栽培的野麦单胞菌的种群遗传学。我们假设人工选择会降低管理种群的遗传多样性，并根据基因流的数量影响种群的分化。通过同工酶分析（10个位点）研究了九个野生，就地管理和栽培的种群（264种植物）。在圆柱状仙人掌物种中，苏氏链球菌的遗传变异最高（例如H_T = 0.592）。耕种种群的遗传变异（Ho = 0.611，He = 0.588）略高于野生种群（Ho = 0.556，He = 0.583），并在原地管理种群（Ho = 0.536，He = 0.578），但差异不显着。大多数遗传变异发生在种群内部，所有种群之间的分化程度低且基因流高（平均F_（ST）= 0.064，Nm_（FST）= 3.659和Nm_（GST）= 3.803）与蝙蝠授粉，种子传播有关鸟类和植物繁殖体的运输。遗传距离与地理距离无关，在大多数情况下，相似管理的种群之间的遗传距离较低。管理的原地和耕种种群是该物种遗传多样性的重要储存库，需要在保护计划中加以考虑。

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