摘要
在构建２张ＲＦＬＰ图谱的基础上，定位分析了控制水稻抽穗期的主效基因和微效基因。在特三矮２号／Ｃ．Ｂ．群体中定位到２个主效基因和２个微效基因。该２个主基因分别位于第３、８染色体上，累加贡献率约达５０％，加性效应值分别为７天和６天，而分别位于第１、１２染色体的２个微效基因的贡献率仅分别为８．３％和９．６％，加性效应值仅为３天和４天。在外引２号／Ｃ．Ｂ．群体中定位了２个连锁于第６染色体的主效基因和１个位于第８染色体的微效基因，该２个主效基因的贡献率分别为３５．５％和２７．４％，来自外引２号的该２个基因其效应均为明显推迟抽穗，因而可推测它们为感光性基因，微效基因的贡献率仅为８．９％，基因效应值较小。
In this study,based on two RFLP maps that had been constructed,major genes and minor genes controlling heading date have been identified and mapped.In Tesanai 2/C.B.population,two major genes on chromosome 3,8 and two minor genes on chromosome 1,12 were mapped,two major genes which collectively explained 49.2% of observed phenotypic variation had additive effects of 7 and 6 days respectively,while two minor genes which explained 8.3% and 9.6% respectively had additive effects from 3 to 4 days.In other population(Waiyin 2/ C.B.),two major genes linked on chromosome 6 and one minor gene on chromosome 8 have been mapped. Two major genes which explained 35.5% and 27.4% of the observed phenotypic variation respectively from Waiyin 2 had gene effects of later heading.They were indicated to be photosensitive genes.While minor gene which explained 8.9% of the observed phenotypic variation had a small gene effect.
基金
国家高技术研究发展计划资助
浙江省自然科学基金
