超甜玉米鲜穗产量和含糖量的配合力及遗传特性分析  

Analysis of combining ability and inheritance trait of fresh ear yield and sugar content in super sweet corn

作　　者：王晓明[1] 曾慕衡[1] 乐素菊[1] 

机构地区：[1]仲恺农业技术学院农业与生物学院,广东广州510225

出　　处：《西北农林科技大学学报（自然科学版）》2005年第7期56-60,共5页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家星火计划资助项目(2001EA780054);广东省星火计划资助项目(2003C201027)

摘　　要：以6个鲜穗产量和含糖量表现差异显著的超甜玉米自交系为研究对象,采用Griffing不完全双列杂交法,分析了其配合力和遗传特性。结果表明,T3,T9,T17和T244个亲本的鲜穗产量和含糖量表现出较高的一般配合力(GCA)和特殊配合力(SCA),有望组成高产和高含糖量的超甜玉米新组合;超甜玉米鲜穗产量的狭义遗传力较低,为17.83%,由非等位基因互作效应引起,且显性基因起主要作用,控制鲜穗产量的显性基因至少有4对;含糖量的遗传效应主要由加性效应和显性效应组成,加性效应比显性效应更重要,狭义遗传力为53.0%,控制含糖量的基因至少有3对。Combining ability and inheritance of 6 inbred lines in super sweet corn,whose fresh ear yield and sugar content were evidently different,were studied and analysed by the incomplete dialle cross way of Griffing.The results indicated that fresh ear yield and sugar content of 4 parents had higher G.C.A and S.C.A,which T3,T17,T19,T24 could be easily combined with the crossing combinations of higher fresh ear yield and sugar content.Heritability in a narrow sense of fresh ear yield in super sweet corn was lower (17.83%) which was caused by interaction among non-allel genes and the character was controlled by more than 4 pairs of dominant genes which made main function.Inheritance effect of sugar content was mainly controlled by “additive-dominant” rule in which additive effect outweighed dominant effect.Heritability in a narrow sense of sugar content was 53% and the sugar content was controlled by at least 3 pairs of genes.

关 键 词：超甜玉米 鲜穗产量 含糖量 配合力 

分 类 号：S513.032[农业科学—作物学]