‘辽粳326’ב莎莎妮’粳稻杂交后代垩白粒率的遗传分析  

Genetic Segregation Analysis of Chalky Rice Kernel Rate in Japonica Hybridization 'Liaojing 326'×'Shashani'

作　　者：詹瞻[1] 王术[1] 王伯伦[1] 贾宝艳[1] 黄元财[1] 马作斌[1] 孙瑞[1] 

机构地区：[1]沈阳农业大学农学院,沈阳110866

出　　处：《中国农学通报》2011年第9期57-60,共4页Chinese Agricultural Science Bulletin

基　　金：辽宁省教育厅创新团队项目(LT2010093);教育部重点实验室开放课题(413010402)

摘　　要：以2个垩白粒率差异较大的粳稻品种‘莎莎妮’(垩白粒率为2.5%)和‘辽粳326’(垩白粒率为72.3%)的杂交后代F1、F2群体为试材,利用数量性状遗传分析方法,研究北方粳稻垩白粒率的遗传规律。结果表明:(1)垩白粒率的遗传受母体植株的影响较大,在F2米粒间(着生在F1植株上的米粒)没有发生分离。(2)着生在F2植株上的米粒的垩白粒率的变异主要是由遗传因素引起的,其遗传模型为2对加性—显性—上位性主基因+加性—显性多基因模型,低垩白表现为显性。(3)主基因遗传力h2mg很大,达到了90.38%,多基因遗传力h2pg只占0.11%,并且存在1对效应很大的主效基因。Inheritance of chalky rice rate of north japonica rice was studied by using quantitative character genetic analysis method,with hybrid progenies F 1,F 2 of ＇ Shashani ＇（chalky rice rate was 2.5%） and ＇ Liaojing 326 ＇（chalky rice rate was 72.3%）,which had significant difference in chalky rice rate.The results showed that：（1） chalky rice rate was greatly affected by the maternal plant and no genetic segregation occurs among F 2 grains born on F 1 plant.（2） The variation of chalky rice rate among grains born on F 2 plant was mainly caused by genetic factors,its genetic model was additive-dominance-epistasis major genes additive-dominance polygenes with two major genes,and low chalky rice rate express dominant trait.（3） The heritability of major genes was 90.38% and the heritability of polygenes was 0.11%,and there was a pair of major gene with great effects.

关 键 词：水稻 垩白粒率 主基因+多基因混合遗传模型 

分 类 号：S511.22[农业科学—作物学]