高配合力双低油菜细胞质雄性不育基因的遗传及细胞质效应

Heredity of sterile gene and genetic effects of cytoplasmic male sterilein high combining capacity of double low B.napus

采用Ｍ×Ｎ设计，研究不育基因在１５个杂种Ｆ１的遗传效应。结果表明：Ｆ１性状的基因效应比较复杂，由加性效应、显性效应、母体效应和剩余共同决定的，其中植株高度和芥酸含量的遗传简单，分别由母体效应和加性效应决定。单株产量和千粒重这两个性状的遗传最复杂，是由加性、显性、母体、上位性和超显性等效应共同决定的。在相同的核背景下，３８４Ａ、２１７Ａ两种不育胞质对产量性状如一次分枝角果数、全株总有效角果数、单株产量有一定的正效应；对病毒病和菌核病的抗性则因细胞质、细胞核的不同而异。

MN design was used to study genetic effects of cytoplasmic male sterile genes on 15 F1 Hybrids. It showed that: the genetic effects for F1 traits were complicated. They were controlled by additive effect, dominant effect, maternal effect and residuary effect(it maight include cytoplasmic effect, predominant effect et al.). The heredity of plant height and the erucic acid content was simple, they were controlled by maternal effect and additive effect, respectively. On the other hand, the heredity of single plant yield and 1000seed weight were the most complicated. They were determined by additive effect, dominant effect, maternal effect, predominant effect et al. in the same time. The effects of male sterile cytoplasm on agricultural characters showed that, the effects on yield traits such as pods number, the total pods number per plant and yield of per plant were positive. The resistance to virus and Sclerotinia Sclerotirum was different according to nuclear and cytoplasm in this paper.