籼稻米粒延伸性的遗传研究  

Genetic Analysis of Cooked Rice Elongation in Indica Rice ( Oryza sativa L.)

作　　者：包劲松[1] 谢建坤[1] 夏英武[1] 

机构地区：[1]浙江大学华家池校区核农所,浙江杭州310029

出　　处：《作物学报》2001年第4期489-492,共4页Acta Agronomica Sinica

基　　金：浙江省 9410项目资助 (96 110 2 0 6 )

摘　　要：采用包括遗传主效应和基因型与环境互作效应的三倍体遗传模型 ,分析了两环境下籼稻米粒延伸性的遗传基础。结果表明 ,米粒延伸性及其相关性状 (米粒长和饭粒长 ) ,主要受制于遗传主效应 ,但也受到基因型与环境互作效应的控制。在遗传主效应中又以种子基因加性效应为主 ,其次是母体植株的基因效应。米粒长和饭粒长的狭义遗传率都较高 ,分别为 65.9%和 61.7% ,但米粒延伸性的狭义遗传率偏低 ( 4 3.9% ) ,认为对米粒长和饭粒长等性状进行早代选择有一定效果 ,但对米粒延伸性进行早代选择则效果不佳。对亲本的遗传效应值预测表明 ,密阳 4 6对米粒延伸性的改良效果最好 ,虽然对米粒长有一定的减效作用 。Genetic models including genetic effects and genotype by environment interaction effects for traits of triploid endosperms in cereal crops were used to analyze the cooked rice elongation (CRE) traits of indica rice at two environments. It was found that the milled rice length (MRL), cooked rice length (CRL) and CRE were mainly controlled by the main genetic effects as well as the genotype by environment interaction effects. As to the main genetic effects, the three traits were mainly controlled by the seed direct additive effects, but the maternal additive and dominance effects could not be neglected. MRL and CRL had a higher narrow sense heritabilities (65.9% and 61.7%, respectively) than CRE (43.9%), which suggested that early selection for MRL and CRL was effective while not effective for CRE. Prediction of the genetic effects of the parents showed that the Miyang 46 was better than the others for making a cross with improved cooked rice elongation, because it could increase both CRL and CRE.

关 键 词：米粒延伸性 遗传主效应 环境互作效应 籼稻 

分 类 号：Q943[生物学—植物学]