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以籼稻密阳23与粳稻吉冷1号配制所获得的F2:3群体200个家系作为作图群体,在北京、昆明、三亚、公主岭和韩国春川等5个点进行水稻结实率的鉴定,并利用SSR标记对水稻结实率数量性状位点进行检测。结果表明,水稻结实率表型值及其在F3家系群中的分布以及所检测到的QTL数目因生长环境不同而有较大差异,说明QTL与环境有明显的互作效应。水稻结实率在F3家系群中呈接近正态或偏态的连续分布,是由多个基因所控制的数量性状。共检测到与水稻结实率相关的QTL 14个,分布于第1、2、3、4、6、7、8、10和12染色体上,对表型变异的贡献率为4.9%~15.3%。分别位于第1、2、6和12染色体RM1~RM259、RM263~RM6、RM340~RM30、RM270~RM17区间的qSSR1、qSSR2、qSSR6和qSSR12至少在2种生长环境下均检测到,对表型变异的贡献率分别为4.9%~8.4%、4.8%~7.2%、7.6%~10.7%和7.4%~10.4%。以上多数QTL增效等位基因均来自吉冷1号,基因作用方式主要为部分显性或显性或超显性。
200 families of F2: 3 population obtained from the indica rice Mieyang 23 and japonica Jialing 1 were selected as the mapping population, and the rice seed setting rate was identified at five points in Beijing, Kunming, Sanya, Gongzhuling and Chuncheon, Korea. SSR markers were used to detect quantitative trait loci in rice seed setting rate. The results showed that the phenotypic value of rice seed setting rate and its distribution in F3 pedigree groups and the number of detected QTLs varied greatly depending on the growth environment, indicating that the QTLs had obvious interaction effects with the environment. Rice seed setting rate in F3 family was nearly normal or skewed continuous distribution, is a number of genes controlled by the number of traits. A total of 14 QTLs for rice seed setting rate were detected on chromosomes 1, 2, 3, 4, 6, 7, 8, 10 and 12, contributing 4.9% -15.3% of phenotypic variance. The qSSR1, qSSR2, qSSR6 and qSSR12 loci located on RM1 ~ RM259, RM263 ~ RM6, RM340 ~ RM30, RM270 ~ RM17 on chromosomes 1, 2, 6 and 12 were detected in at least two growth environments, The contribution rates were 4.9% -8.4%, 4.8% -7.2%, 7.6% -10.7% and 7.4% -10.4% respectively. Most of the above QTL synergistic alleles are from Jelly 1, and the mode of gene action is mainly dominant or dominant or super dominant.