用培矮64S/日本晴F2群体对水稻6个农艺性状的QTL定位

 用水稻测序品种培矮64S和日本晴配组建立了由180个单株组成的F2群体，构建了含137个SSR标记的连锁遗传图谱，对水稻的分蘖数、有效分蘖数、分蘖率、株高、剑叶长和穗长等6个相关农艺性状进行了QTL定位分析。共检测到14个QTL，分布在第1、2、4、5、6、7染色体的11个区间。检测到1个控制株高的主效QTL(qPH1 2),位于第1染色体，其表型贡献率为24.0%；1个控制剑叶长的主效QTL(qFL4）,位于第4染色体，其表型贡献率为30.5%。对所定位QTL的价值、QTL在染色体上的区域分布等进行了探讨。

Mapping of Quantitative Trait Loci for Six Agronomic Traits of Rice in Pei'ai 64S/Nipponbare F2 Population

Quantitative trait loci (QTL) for six related agronomic traits including tiller number per plant, effective tiller number per plant, percentage of tillering, plant height, flag leaf length and panicle length were mapped, by using a F2 population consisted of 180 lines from the cross between two genome-sequenced rice varieties Pei′ai 64S and Nipponbare, and a genetic linkage map including 137 SSR markers constituted with (Pei′ai 64S/Nipponbare) F2 population. A total of 14 QTLs for the six traits were identified at 11 intervals of chromosomes 1, 2, 4, 5, 6, and 7. One major QTL(qPH1-2) for plant height was located on chromosome 1, and another major QTL(qFL4) for flag leaf length, on chromosome 4. Moreover, the worth of the mapped QTLs and the distribution of QTL on chromosomes were discussed.