豌豆种质资源形态标记遗传多样性分析

通过对国内外不同地理来源624份豌豆资源20个形态性状的评价,初步了解其遗传多样性特点,为解决种质创新与品种改良遗传基础狭窄问题提供思路.对性状表现平均值、变异系数、遗传多样性指数研究结果表明,国内外不同地理来源豌豆资源群闻的遗传变异大;三维主成分分析探测到参试资源由国内和国外两大基因库构成;资源群体间遗传距离的UPG-MA聚类分析结果也表明,国内外豌豆资源聚成两大不同类群,印证了三维主成分分析得到的豌豆资源两大基因库构成的结论.本研究证明基于形态性状评价的遗传多样性分析结果同样可靠.

Genetic Diversity of Pea (Pisum sativum L.) Germplasm Resources Revealed by Morphological Traits

624 pea genotypes sampled from a world collection of various geographical origins were evaluated based on 20 morphological traits, to create initial knowledge with better understanding of their genetic diversity, and to provide useful information for variety improvement in pea breeding programs. Large genetic variation among geographic origin based groups of genetic resources were revealed by comparison of mean value, CV, genetic diversity index of their 20 morphological traits. Two gene pools, a Chinese gene pool and a oversea gene pool, were detected and defined by three-dimensional PCA graph method. Genetic distance based UPGMA clustering analysis provided the same results for support. The research results testified the reliability of morphological traits based genetic diversity analysis.