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《Journal of Biomathematics》 1996-01
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GENETIC ANALYSIS OF ENDOSPERM,CYTOPLASMIC AND MATERNAL EFFECTS FOR EXTERIOR QUALITY TRAITS IN INDICA RICE

Shi Chunhai;Zhu Jun(Department of Agronomy,Zhejiang Agricultural University,Hangzhou,310029)  
Analysis of endosperm,cytoplasmic and maternal effects for exterior quality traits of early season Indica rice( Oryza sativa L.) was conducted based on the genetic model for quantitative traits of seeds in cereal crops. Nine cytoplasmic male sterile lines (Zhenshan 97 A etc.) as females and five restoring lines (T49 etc.) as males were used in incomplete diallel crosses.The results indicated that the exterior traits for brown rice were controlled by endosperm,cytoplasmic and maternal genetic effects.Maternal heritabilitywas more important for brown rice length(BRL),ratio of brown rice length to width(L/W) and ratio of brown rice length to thickness (L/T).But brown rice width (BRW) and brown rice thickness (BRT) were mainly controlled by endosperm direct heritability.Cytoplasm heritabilities were also important for BRL and L/W.Correlation analysisshowed that the genetic correlations between BRL and BRW,BRL and BRT,BRW and BRT,BRW and L/W,BRT and L/T,or L/W and L/T were mainly controlled by endosperm and maternal additive effects.But endosperm and maternal dominance correlations between BRL and L/W,BRL and L/T,BRW and L/T,or BRT and L/W were more important than additive correlations. Predicted genetic effects showed that V20A,Zuo 5 A and Cezao 2-2 were better than other parents,their genetic effects could improve the exterior traits of rice.Crosses of V20A/102 and Zuo 5 A/Cezao 2-2 had exterior quality better than others.
【Fund】: 国家教委《跨世纪优秀人才专项基金》;;浙江省科委资助
【CateGory Index】: S511.2
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