【摘要】 以窄叶青 8号和京系 17构建的加倍单倍体群体为材料 ,系统分析了稻谷粒长、粒宽及长宽比 3个性状在北京、杭州、海南 3个不同环境下的表现 ,并进行了数量性状基因位点的比较定位。检测结果表明 ,3个环境下共检测到 18个QTLs,分布于水稻第 1、2、3、4、6、8和 12染色体上 ,其中与粒长性状相关QTL 3个 ,LOD值为 2 .6 9～ 4 .75 ,贡献率为 9.9%～18.4 % ;与粒宽性状相关QTL 9个 ,LOD值为 2 .4 3～ 5 .77,贡献率为 8.4 %～ 2 5 .6 % ;与长宽比性状相关QTL 6个 ,LOD值为 2 .4 4～ 6 .0 2 ,贡献率为 9.8%～ 2 2 .7%。更多还原

【Abstract】 Quantitative trait loci(QTL) for three grain shape traits including grain length(GL), grain width(GW) and grain length-width ratio (GLW) were mapped in three environments (Beijing, Hangzhou and Hainan). Totally, 18 QTLs were detected for grain shape, locating on chromosome 1, 2, 3, 4, 6, 8 and 12. Three putative QTLs, nine putative QTLs, and six putative QTLs were detected for grain length, grain width, and length-width ratio, respectively. All of these QTLs explained 9.9% to 18.4% phenotypic variation of grain length, 8.4% to 25.6% for grain width, and 9.8% to 22.7% for length-width ratio. The LOD value varied from 2.69 to 4.75 for grain length, from 2.43 to 5.77 for grain width, and from 2.44 to 6.02 for length-width ratio, respectively.更多还原