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利用粳稻品种秀水79/C堡重组自交系群体的254个株系,在南京和泗洪两个环境条件下,对水稻生育期、株高和单株有效穗数进行非条件和条件QTL定位。结果表明,2种方法检测到的3个性状的QTL均以加性效应为主,上位性位点对表型解释率较小,加性位点和上位性位点均不存在基因型与环境互作。将生育期矫正到同一水平,检测到1个单株有效穗数适用有利等位变异RM80-160bp,加性效应为0.71。将单株有效穗数矫正到同一水平,检测到1个生育期性状适用有利等位变异RM448-240bp,加性效应为4.64。将株高矫正到同一水平,检测到1个单株有效穗数适用有利等位变异RM80-160bp,加性效应为0.62;1个生育期适用有利等位变异RM448-240bp,加性效应为3.89。利用这些适用有利等位变异改良目标性状不会对另外2个性状产生影响。
Using 254 lines of japonica rice variety Xiushui 79 / C Bao inbred line, under both environmental conditions of Nanjing and Sihong, non-conditional and conditional QTL mapping of rice growth stage, plant height and effective panicles per plant . The results showed that the QTLs of the three traits detected by the two methods were mainly additive effects, and the epistatic loci explained the phenotype slightly, with no additive genotype or epistasis Interaction. Correction of the growth stage to the same level, detected a number of effective panicles per plant for favorable allelic variation RM80-160bp, additive effect of 0.71. The number of effective spikelets per plant was corrected to the same level, and one of the favorable alleles of RM448-240bp and the additive effect of 4.64. The plant height was corrected to the same level. The effective spike per plant was detected for RM80-160bp and the additive effect was 0.62. The favorable allele variant RM448-240bp for one growth stage and the additive effect was 3.89 . Improving target traits using these suitable favorable alleles will not affect the other two traits.