水稻籼粳交重组自交系群体穗部性状的相关和遗传分析  

Genetic and Correlation Analysis of the Panicle Traits of Recombinant Inbred Lines Derived from an Indica/Japonica Rice Cross

作　　者：匡勇[1,2] 罗丽华[1] 周倩倩[1] 何云丽[1] 范锡麟[1] 肖应辉[1,3] 

机构地区：[1]湖南农业大学农学院,湖南长沙410128 [2]湖南农业大学科学技术处,湖南长沙410128 [3]湖南作物种质创新与资源利用重点实验室,湖南长沙410128

出　　处：《华北农学报》2011年第3期72-78,共7页Acta Agriculturae Boreali-Sinica

基　　金：国家"863"计划项目(2006AA100101);湖南农业大学作物种质创新与资源利用重点实验室开放研究项目(09KFXM07)

摘　　要：利用由大穗籼稻品系1126与粳稻品种日本晴构建的包含216个株系(F7)的重组自交系群体为材料,调查每穗总粒数、穗长、一次枝梗数和二次枝梗数的表型分布,对4个穗部性状进行了相关分析和主基因+多基因混合遗传模型分析。相关分析表明,除穗长与一次枝梗数以外,其余性状均呈1%显著水平的两两正相关,其中二次枝梗数对于增加每穗总粒数的作用最大。遗传分析表明,每穗总粒数遗传由2对具有重叠作用的主基因控制;穗长和一次枝梗数由2对加性主基因+多基因控制;二次枝梗由4对主基因(2对等效)+加性多基因控制。4个性状均以主基因遗传为主。Genetic and correlation analysis of the four panicle traits,which included panicle length（PL）,grain number per panicle（GNP）,primary branch number（PBN） and secondary branch number（SBN）,were conducted,with a set of recombinant inbred lines（RILs） derived from a cross of Japonica rice cultivar Nipponbare and a large panicle indica rice 1126.Correlation analysis showed that all the traits were significant positive correlated to each other at the 1% level except PL and PBN.Genetic analysis showed that the trait of grain number per panicle（GNP） was controlled by two major genes with overlap additive effect,and both of panicle length（PL） and primary branch number（PBN） were controlled by two major genes additive plus polygenes,however,secondary branch number（SBN） was controlled by four major genes with each two of equal additive plus polygenes.All the four panicle traits were mainly governed by major genes.

关 键 词：水稻 穗部性状 遗传模型 相关分析 重组自交系 

分 类 号：S511.03[农业科学—作物学]