温敏雄性不育小麦SCT-1育性主基因+多基因遗传模型分析  

The Mixed Genetic Analysis of Thermo-sensitive Male Sterility of SCT-1 in Wheat

作　　者：郑建敏[1] 蒲宗君[1] 李式昭[1] 李俊[1] 杨恩年[1] 孙华 刘培[3] 

机构地区：[1]四川省农业科学院作物研究所,农业部西南地区小麦生物学与遗传育种重点实验室,四川成都610066 [2]四川省南部县农牧业局,四川南部637300 [3]四川省农业科学院农产品加工研究所,四川成都610066

出　　处：《华北农学报》2014年第6期68-72,共5页Acta Agriculturae Boreali-Sinica

基　　金：省财政基因工程专项资金项目;四川省杰出青年基金项目(2012JQ0066);"863"计划(2011AA10A106);"十二五"国家支撑计划项目(2011BAD35B03);四川省青年科技创新研究团队项目(2014TD0014)

摘　　要：研究温敏雄性不育系SCT-1在四川生态环境下的育性遗传特征,为其应用提供理论依据。选用2个具一定恢复效果的品系B2183、M2003-1,分别与SCT-1杂交构建群体,利用亲本、F1及F2群体的表型数据,采用主基因+多基因遗传模型对SCT-1育性遗传特性进行分析。结果表明:SCT-1育性主要受核基因控制,2个组合F2育性均呈连续分布,具多峰、偏态现象,SCT-1/B2183组合育性遗传符合MX2-AD-AD模型,即2对加性-显性主基因+加性-显性多基因模型;SCT-1/M2003-1组合符合MX1-AD-ADI模型,即1对加性-显性主基因+加性-显性-上位性多基因模型;2个组合中主基因遗传率分别为92.89%,91.19%,主基因对育性恢复的影响较大。聚合多个主基因的恢复材料对SCT-1杂交育种利用更为有利。In this research we try to explore the genetic characteristics of thermo-sensitive male sterility line SCT-1 in Sichuan ecological condition,in order to provide a theoretical guidance for its utilization and lay a foundation for the further breeding. We chosed two different restore lines to make the two crosses（ SCT-1 / B2183,SCT-1 /M2003-1）,investigated the self-setting seed in 4 populations of 2 parents（ P1 and P2）,F1 and F2to analyses genetic characteristics of sterility by the mixed major gene plus poly-genes genetic model method. Results showed that the genetic model MX2-AD-AD（ two additive-dominance major genes plus additive-dominance poly-genes） was the most suitable model for the cross SCT-1 / B2183,while MX1-AD-ADI（ one additive-dominance major genes plus additive-dominance-epitasis poly-genes） model was better fit the cross SCT-1 / M2003-1. Major-gene heritability of the two different crosses was 92. 89% and 91. 19% respectively. Major-genes have important influence in fertility,we could cultivate good restore line by converge different major-gene.

关 键 词：小麦温敏不育 主基因+多基因遗传模型 育性 遗传率 

分 类 号：S512.03[农业科学—作物学]