摘要
本试验用苏麦3号等6个小麦品种的6×6双列杂交F_1,进行了赤霉病病小穗率的配合力分析和Wr/Vr 分析,估算了遗传力等参数,并计算了病小穗率与株高、开花期、小穗密度、穗长、百粒重、穗粒数和穗粒重之间的表现型、基因型和环境相关系数.结果表明,小麦赤霉病抗性主要受加性基因效应控制,非加性基因效应也有显著作用,且抗病对感病为部分显性.苏麦3号具有较多的显性抗病基因和较好的一般配合力,它与其它品种杂交能极显著地降低杂种后代的病小穗率.杂种F_1赤霉病病小穗率与株高、穗长、百粒重、穗粒数和穗粒重的表现型和基因型呈极显著负相关;与开花期和小穗密度的表现型和基因型呈极显著和不显著的正相关.
A set of 6×6 dialle crosses of six wheat varieties is used to study the com-bining ability and w_r/v_r graphic analysis of scab spikelets/spike.The result sho-ws the inheritance of scab resistance in wheat is mainly controlled by additivegene effects,——non-additive effects are also significant.The scab resistance expr-esses partial dominance over scab infection.“Sumai 3”possesses more dominantresistance genes and higher general combining ability.The scab spikelets/spike isgreatly decreased in the progenies produced by crossing “Sumai 3”with othervarieties.
出处
《河南农业大学学报》
CAS
CSCD
1989年第1期40-47,共8页
Journal of Henan Agricultural University
关键词
赤霉病
遗传
基因
加性效应
配合力
wheat
scab
inheritance
gene
additive effect
combining ability
