芝麻开花时间的主基因+多基因遗传分析  

Genetic Analysis of Flowering Time with the Mixed Major Gene Plus Polygene Inheritance Model in Sesame

作　　者：张体德[1] 杜振伟[1] 梅鸿献[1] 刘艳阳[1] 崔承齐[1] 胡程达[2] 马青荣[2] 郑永战[1] ZHANG Tide;DU Zhenwei;MEI Hongxian;LIU Yanyang;CUI Chengqi;HU Chengda;MA Qingrong;ZHENG Yongzhan(Sesame Research Center,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;Henan Institute of Meteorological Science,Zhengzhou 450003,China)

机构地区：[1]河南省农业科学院芝麻研究中心,河南郑州450002 [2]河南省气象科学研究所,河南郑州450003

出　　处：《河南农业科学》2019年第6期67-72,共6页Journal of Henan Agricultural Sciences

基　　金：现代农业产业技术体系建设专项资金项目(CARS-14);河南省农业科学院优秀青年科技基金项目(2018YQ27);河南省农业科学院自主创新专项基金项目(2018ZC72)

摘　　要：为探索芝麻光周期敏感性的遗传规律,进而合理利用外来芝麻种质资源,以豫芝11号和M368为亲本构建了包括P1、P2、F1、B1、B2和F2的6个世代群体,通过主基因+多基因混合遗传模型对芝麻开花时间进行了遗传分析。结果表明,芝麻开花时间遗传符合2对主基因加性-显性-上位性模型,2对主基因的加性效应大小相似且方向一致,来自豫芝11号的等位基因有利于缩短开花时间。第1对主基因具有部分负向显性作用,第2对主基因具有正向超显性作用。2对主基因间互作效应对开花时间具有一定影响,且在第2对主基因处于杂合状态时对开花时间影响较大。在B1、B2、F2世代,2对主基因的遗传率分别为69.39%、88.25%、73.26%。To remove the barriers brought by photoperiod sensitivity in utilization of exotic sesame germplasm,the inheritance of flowering time was analyzed using the mixed major gene plus polygene model with a six-generation segregating population,P1,P2,F1,B1,B2,F2,developed from Yuzhi 11 and M368.The results showed that flowering time was mainly controlled by two major genes in sesame,which showed additive,dominant as well as epistatic effects.The additive effects of the two major genes were same in direction and similar in size.The first major gene showed negative partial-dominance effect,and the second major gene had positive over-dominance effect.Epistatic behaviors between two major genes were also detected,and the effects increased higher when heterozygote existed at the second gene loci.The heritability of two major genes in B1,B2 and F2 generations were 69.39%,88.25% and 73.26%,respectively.

关 键 词：芝麻 外来种质 开花时间 光周期敏感性 主基因+多基因混合遗传模型 

分 类 号：S565.403[农业科学—作物学]