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

LIAO Chun-Yan; WU Ping; YI Ke-Ke; HU Bin; NI Jun-Jian (Department of Biological Science, Life Science College, Zhejiang University, Hangzhou 310029, China)  
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.
【Fund】: 国家自然科学基金
【CateGory Index】: Q943
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