芥菜型油菜重组自交系群体重要品质性状的遗传分析

The Genetic Analysis of the B.juncea RIL Population for Important Quality Traits

本研究调查了一个包含139个芥菜型油菜重组自交系群体的脂肪酸(硬脂酸、油酸、亚油酸、亚麻酸、芥酸)和硫甙含量,相关性分析显示,芥酸与其它脂肪酸间均呈极显著负相关,而除芥酸外的其它脂肪酸间则呈极显著正相关。品质性状均表现出较高广义遗传力,其中芥酸和硫甙的遗传力超过90%,硬脂酸和亚油酸的遗传力在80%~90%之间,而亚油酸和亚麻酸的遗传力在70%~80%之间。主成分分析获得2个分别能解释64.9%和16.4%的变异因子,散点图将全部139个株系分成群Ⅰ、群Ⅱ和4个散落的株系,聚类分析对于此群体品质性状的遗传和特异材料的筛选有一定参考价值。

The fatty acids and glucosinolate content of one 139 RIL（recombinant inbred lines） lines were analyzed, the correlation among different fatty acids was analyzed, showed significantly negative correlation between fatty acids and other fatty acids and significantly positive correlation among different fatty acids expect for erucic acid.All of the quality traits showed high heritability,that＇s 94.32; for glucosinolate, 91.09 ; for erucic acid, 89. 54% for oleic acid, 80.11% for stearic acid, 77.89% for linoleic acid, 74.16% for linolenic acid. The PCA （Principal Component Analysis） analysis provided two factors,which explained 64.9% and 16.4% phenotypic variation.The scatted chart was made with the two factors,which divided the 139 lines into group I ,group II and four scatted lines, the results would be useful for the research of genetics and screening of special materials of those quality traits.