芥菜型油菜自交亲和性变异分析

以来自不同国家、不同地区的34份芥菜型油菜为试验材料,对芥菜型油菜自交亲和性进行了分析,结果表明,芥菜型油菜大部分为自交亲和类型,但芥菜型油菜的自交亲和性差异较大,亲和指数在0.25～9.73间.这种差异不仅存在于品种间,而且存在于亚种间.在34份参试材料中,2个品种表现为自交不亲和(0<亲和指数<1.00),14个品种表现为自交亲和(亲和指数>1),18个品种表现为高自交亲和(亲和指数>4.00).自交亲和性因地区而异,虽然我国有的芥菜型油菜品种的自交亲和性较高,但是整体存在较大的差异,有自交亲和品种,也有自交不亲和品种.芥菜型油菜是自交亲和植物,自交亲和材料中也有自交不亲和类型,因而通过定向培育可育成自交不亲和系,对进一步利用杂种优势、大量筛选找到优良杂交组合并进行杂交种的生产具有重要的意义.

Variation Analysis on Self-compatibility in Brassica juncea

Abstract: In this paper,with 34 Brassica juncea from different countries and different area as experiment materials,the self-compatibility index and variation of Brassica juncea were studied.The results showed that:according to self-compatibility evaluation criteria, the most of Brassica juncea are self-compatible, but Brassica juncea self-compatibility varied within a great range 0.25-9.73,This variation existed not only among the species but among sub-species.evaluated by the self-compatible indexes,among 34 experiment materials,two varieties are self-incompatible(0 1.00),eighteen varieties are high self-compatible (SC>4.00),and no varieties are high self-inconpatible.The self-compatibility varied with regions, though some of Brassica juncea in china are high self-compatible,it exists great variation in a whole.some are types of self-compatible,some are high types of self-compatible,and some are self-incompatible.while Brassica juncea from overseas had little variation of self-compatibility, and there is no self-incompatible cultivar.