Molecular characterization of common bean accessions using microsatellite markers

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY
T. C. D. Oliveira, M. Barelli, Altacis Junior de Oliveira, Nilo Sander Leal, T. A. Gilio, Rafhael Felipin Azevedo
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引用次数: 0

Abstract

ABSTRACT The common bean, a legume of significant economic importance, is renowned for its extensive genetic variability. It is crucial to comprehend genetic diversity, analyze population structure, and understand relationships among commercial classes of accessions to facilitate genetic improvement. This study aimed to molecularly characterize 143 common bean accessions by employing 25 SSR molecular markers. The objectives were to estimate genetic diversity, analyze genetic structure, and cluster populations using the UPGMA and PCoA methods. A total of 105 alleles were amplified using microsatellite loci, and the observed heterozygosity was lower than expected across all loci, indicating inbreeding within the populations. Among the loci, 22 were highly informative, demonstrating their effectiveness and polymorphism in detecting genetic diversity. The genetic variability within the population was found to be the highest, while variation between populations was the lowest. The analysis of population structure revealed the presence of three populations with a notable rate of gene introgression. The UPGMA analysis categorized the accessions into 15 groups, but they did not form distinct clusters based on their geographic regions or gene pool. The first two principal coordinates accounted for 13.95% of the total variation among the accessions. The SSR markers employed effectively detected genetic variability among the common bean accessions, revealing that their genetic diversity was not correlated with their geographic distribution in this study.
利用微卫星标记对普通豆种质进行分子鉴定
普通豆是一种具有重要经济价值的豆科植物,因其广泛的遗传变异性而闻名。了解遗传多样性,分析群体结构,了解商业品种间的关系,对遗传改良具有重要意义。利用25个SSR分子标记对143份普通豆材料进行分子鉴定。目的是利用UPGMA和PCoA方法估计遗传多样性,分析遗传结构和聚类群体。利用微卫星位点扩增了105个等位基因,观察到的杂合度均低于预期,表明群体内存在近交现象。其中22个位点信息丰富,显示了它们在检测遗传多样性方面的有效性和多态性。群体内的遗传变异最大,群体间的遗传变异最小。群体结构分析显示存在3个具有显著基因渗入率的群体。UPGMA的分析将这些物种分为15类,但它们并没有根据地理区域或基因库形成不同的集群。前两个主坐标占总变异量的13.95%。SSR标记有效地检测了菜豆材料的遗传多样性,表明菜豆材料的遗传多样性与菜豆材料的地理分布不相关。
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来源期刊
Ciencia E Agrotecnologia
Ciencia E Agrotecnologia 农林科学-农业综合
CiteScore
2.30
自引率
9.10%
发文量
19
审稿时长
6-12 weeks
期刊介绍: A Ciência e Agrotecnologia, editada a cada 2 meses pela Editora da Universidade Federal de Lavras (UFLA), publica artigos científicos de interesse agropecuário elaborados por membros da comunidade científica nacional e internacional. A revista é distribuída em âmbito nacional e internacional para bibliotecas de Faculdades, Universidades e Instituições de Pesquisa.
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