几个小麦品种品质性状遗传特性分析
Crop Research(2020)
Abstract
为了解小麦品质性状的遗传特性,指导小麦优质育种的亲本配组,选择8个品种和2个新品系,采用不完全双列杂交,配置25个杂交组合,对F1代产量、千粒质量、湿面筋含量、蛋白质含量、面筋指数、稳定时间等性状进行方差分析和杂种优势分析、一般配合力(GCA)和特殊配合力(SCA)进行相关性分析.结果表明,产量杂种优势整体表现为负向优势,千粒质量为正向优势,其它品质性状整体表现为正向优势;4个亲本材料新麦26、洛麦47、藁优5766及洛麦41的多个品质性状GCA值均较好,可作为综合性状优良的优质亲本;丰德存麦13在产量性状上GCA值最大,适合作为产量改良亲本使用;组合洛麦47×丰德存麦13、洛麦47×丰德存麦5号、郑麦366×藁优5766多个性状SCA效应值和杂种优势值均较高,可作为重点组合进行后代筛选;相关性分析表明,F1各性状均值与亲本一般配合力之和(GCAs)均呈极显著相关,产量、千粒质量、湿面筋、蛋白含量的F1值也与杂种优势值和SCA值紧密相关,沉降值、吸水率、面筋指数和稳定时间的F1值受组合影响较小,主要与双亲的GCAs值相关.
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