甘蓝显性雄性不育材料DGMS79-399-3不育性的遗传效应分析

Genetic Effect of Sterility of the Dominant Genic Male Sterile Materile(DGMS79-399-3)in Cabbage(Brassica oleracea var.capitata L.)

采用两种不同的遗传分析模型，研究了甘蓝显性雄性不育材料DGMS79-399-3不育性的遗传效应。结果表明，运用GriffingⅡ的方法进行遗传效应的分析，就不育度而言，加性作用的方差占总的遗传方差为21．89％，而显性作用的方差为78．11％；广义遗传力为97．22％，狭义遗传力为21．23％。配合力的比较结果表明，5个不育亲本中，523-16的一般配合力最高，达3．17；特殊配合力最高的组合是606-7×102，达10．42。用6个世代联合分析的方法进行遗传规律的研究，结果表明，影响甘蓝显性雄性不育材料育性的最适遗传模型为-对加性-显性主基因＋加性-显性-上位性多基因模型（D模型），主基因的遗传率为82．03％～94．12％，微效基因的遗传率为0．14％-10．94％，两种遗传分析模型研究结果均表明：主基因的显性作用在不育性表达中占主导地位，但主基因的加性作用以及微效基因的影响也不可忽视。

Genetic effect of the dominant genic male sterile material DGMS79-399-3 in cabbage （Brassica oleracea var. capitata L. ） was studied with two different genetic analysis models. The principle of genetics was studied with the method of Griffing Ⅱ , and the result showed that the variance of additive effect in the total genetic variance was only 21.89%, but the dominant variance was 78. 11%. The value of the broad heritability was 97.22%, but the value of narrow heritability was only 21.23%. The result of comparison of combining ability, in the five male sterile parents, the highest general combining ability of P1 from 523-16 was 3.17, but the highest special combining ability from the combination of 606-7 × 102 was 10. 42. The principle of genetics was studied with joint analysis of six generations and the result indicated that the best fitted genetic model affecting fertile characteristics of the dominant genetic male sterility in cabbage was one major additive-dominant gene plus additive-dominant-epistatic polygenes （ D model）, the heritability of major gene was 80. 03% -94. 12%, and the heritability of polygenes was 0. 14% - 10. 94%. The major dominant gene had an important effect, however, the additive effect of major gene and the polygenes effect should be also valued.