不同遗传背景及环境中水稻（Oryza sativa L.）穗长的QTLs和上位性分析

以粳稻Ａｚｕｃｅｎａ为父本与灿稻ＩＲ６４杂交发展的一双单倍体（ＤＨ） 本，与灿稻ＩＲ１５５２杂交发展的一重组自交系（ＲＩ）群体为材料，应用分子标记图说对２个群体在大田答舅栽２个环境下的穗长进行ＱＴＬｓ及上位性效应分析，ＤＨ群体中共检测６个穗长ＱＴＬｓ，位于第１、４长染色体上的３个ＱＴＬｓ，，在２个环境中稳定表达，未检测一闰性效应，加性效应为穗长遗传主效应，ＲＩ群体中，共检测到３个穗长ＱＴＬｓ及６对

QTLs and Epistasis Underlying Rice (Oryza sativa L.) Panicle Length in Different Genetic Background and Environments

A double haploid (DH) population and a recombinant inbred (RI) population derived from a cross between a japonica male parent Azucena and indica female parents, IR64 and IR1552 respectively, were used in both field and pot experiments for detecting QTLs and epistasis for rice panicle length in different genetic background and different environments. Panicale length (PL) was measured at maturity. QTLs for PL were detected using single marker analysis and interval mapping. Epistasis effects on the trait were also analyzed. Nine QTLs were detected in DH population, including 5 QTLs detected from field experiment and 4 from pot experiment among them 3 QTLs mapped on chromosomes 1 and 4 were identified in both field and pot experiments. No significant epistasis effect was detected for PL Four QTLs were detected in RI population, among them 2 from field condition and 2 from pot experiment. 6 pairs of epistasis loci were detected in RI population. One QTL mapped on chromosome 4 and two pairs of epistatic loci were detected in both field and pot experiments. One QTL on chromosome four was identified in both populations, and one marker locus RG23 on chromosome one was involved in additive effect in DH population, but epistasis effects in RI population.