用“主基因＋多基因”遗传模型分析水稻茎蘖成穗率  

Analysis of Percentage of Productive Tiller in Rice by the Genetic Model “Major Gene Plus Polygene”

作　　者：黄永相[1] 郭涛[2] 李伟[1] 蒋世河[1] 陈志强[2] 郭建夫[1] 

机构地区：[1]广东海洋大学农学院,广东湛江524088 [2]华南农业大学,国家植物航天育种工程技术研究中心,广东广州510642

出　　处：《华南农业大学学报》2013年第3期300-303,共4页Journal of South China Agricultural University

基　　金：广东省水稻产业化推进专项(2007A020400003);广东省现代农业产业技术体系建设专项资金(粤财教[2009]356号);广东省科技计划项目(2012B020301003)

摘　　要：选择丛生型籼稻品种HFA-1与少蘖型粳稻品种02428为亲本构建5个世代联合群体(P1、P2、F1、F2和F2∶3),运用植物数量性状"主基因+多基因"混合模型对水稻茎蘖成穗率进行遗传模型判别和遗传参数估算.结果表明,水稻茎蘖成穗率既受1对主基因控制又受多个微效基因影响,符合"主基因+多基因"的D-4模型;分别在F2和F2∶3世代估算的主基因遗传率为55.51%和53.57%、多基因遗传率为33.13%和38.94%,表明水稻高茎蘖成穗率育种不仅要考虑主基因的作用,也不能忽视微效基因的影响,并可在低世代进行目标性状筛选;由各世代所估得的基因加性效应和显性效应分别为-19.92和-6.48,表明选育高茎蘖成穗率材料时应考虑选配不同基因型的亲本.A joint five generations（P1,P2,F1,F2 and F2∶ 3） derived from a cross of HFA-1（indica） × 02428（japonica）,two parents exhibited multi-tiller and less tillers respectively,were evaluated to estimate the genetic model and genetic parameters of percentage of productive tiller（PPT） using the mode of major gene and polygene mixed inheritance of quantitative traits.The results showed that the PPT in rice was controlled by the mixed genetic model of one-major-gene plus polygenes（model D-4）.The heritability of PPT of major gene in F2 and F2∶ 3 generation varied from 55.51% to 53.57% and those of polygenes varied from 33.13% to 38.94% respectively,which suggested that the breeding for high PPT rice should not only take into consideration both major genes and polygenes,but also carry out the selection for it at the early stage of breeding procedure.The additive effect and the dominant effect of PPT in the joint generations were-19.92 and-6.48 respectively,which implied that the negative interaction effects of polygenes should be considered in high PPT breeding.

关 键 词：水稻 茎蘖成穗率 主基因+多基因混合遗传模型 遗传效应 

分 类 号：S852.65[农业科学—基础兽医学]