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首页> 外文期刊>Genetic Resources and Crop Evolution >Molecular diversity, genetic structure and mating system of Calopogonium mucunoides Desv.
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Molecular diversity, genetic structure and mating system of Calopogonium mucunoides Desv.

机译：Calopogonium mucunoides Desv。的分子多样性，遗传结构和交配系统。

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Calopogonium mucunoides Desv. is a species native of South and Central America that is used as green manure and a pasture crop. The molecular genetic diversity was characterized in 195 C. mucunoides accessions from a germplasm collection using 17 microsatellite markers. Outcrossing rate was estimated after the evaluation of six microsatellite loci in 200 genotypes originated from 10 open-pollinated progenies (20 genotypes per progeny). Six genetic clusters were identified in the germplasm collection by the STRUCTURE software analysis, neighbor-joining tree comparisons and principal component analysis, which highly correlated with the geographic locations where these accessions were originated or collected. These results were confirmed using AMOVA. The largest portion of the genetic variation was observed among clusters (64.38%). The results indicated that: multilocus outcrossing rate (t m ) was 16.3%, suggesting a mixed mating system with a predominance of autogamy; single locus outcrossing rate (t s ) was 11%; difference (t m −t s ) was 0.054, indicating that only 5.4% of outcrossing occurred among related individuals; paternity correlation (r p ) was 33% suggesting a low probability of finding full sibs among the progeny; parental coefficient of inbreeding (F m ) was 5.0%, indicating a low degree of inbreeding in each parent. A core collection for C. mucunoides was assembled to capture the allelic diversity found in this study. The complete allelic diversity was represented by only 15 accessions. These results should be useful for exploiting the genetic resources of C. mucunoides and could influence future conservation efforts and breeding programs.
机译：Calopogonium mucunoides Desv。是南美和中美洲的本地物种，用作绿肥和草场作物。分子遗传多样性的特征是使用17种微卫星标记从195个种质收集了C. mucunoides。在评估了来自10个开放授粉后代的200个基因型中的六个微卫星基因座后，估计了异交率（每个后代20个基因型）。通过STRUCTURE软件分析，邻居加入树比较和主成分分析，在种质收集中鉴定出六个遗传簇，它们与这些种质起源或收集的地理位置高度相关。使用AMOVA确认了这些结果。在簇之间观察到遗传变异的最大部分（64.38％）。结果表明：多基因座异交率（t m ）为16.3％，表明混合配种系统具有自配性优势。单基因座异源率（t s ）为11％；差异（t m -t s ）为0.054，表明只有5.4％的异型发生在相关个体之间；亲子关系（r ）为33％，表明在后代中发现完整同胞的可能性较低；父母的近亲繁殖系数（F m ）为5.0％，表明每个父母的近亲繁殖程度都较低。组装了C. mucunoides的核心集合，以捕获在这项研究中发现的等位基因多样性。完整的等位基因多样性仅由15个种质代表。这些结果应有助于开发粘液梭菌的遗传资源，并可能影响未来的保护工作和育种计划。

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