The elite alleles in carrier varieties for growth duration (GD) and productive panicle number per plant (PN) were detected in order to provide genetic information and breeding materials for breeding hybrid japonica crosses with wide adaptability and strong competitive advantage of yield. Natural population, composed of 94 japonica varieties, was used as experiment material. Phenotypes of GD, PN and plant height (PH) were investigated in two environments. The conditional phenotypic data were transferred by the linear model method in software QGAStation 1.0, then association analysis based on the unconditional and conditional phenotypes of GD and PN were analyzed by using general linear model in the software TASSEL.A total of 34 SSR marker loci associated with GD and PN were detected in two environments. Among them, 15 were associated with GD, 19 were associated with PN. Four elite alleles of RM8095120 bp, RM7102176 bp, RM72170 bp and RM72178 bp were associated with GD, and their carrier varieties were Hongmangshajing, Nipponbare, Hongmangshajing, Nannongjing 62401, respectively. These elite alleles can shorten GD by 2.03-9.93 d when they were introduced into improved materials. RM72182 bp associated with PN was an elite allele, and its carrier variety was Xiaoqingzhong. RM72182 bp introduction can increase PN by three. What’s more, these elite alleles above can be used to improve target traits without influencing another two traits.
JIANG Jianhua1,2, CHEN Lan1, LIU Qiangming1, HE Yingjun1, HONG Delin1,*
. Mining Elite Alleles for Growth Duration and Productive Panicle Number per Plant by Association Mapping with Conditional Phenotypic Value in japonica Rice[J]. Chinese Journal OF Rice Science, 2012
, 26(5)
: 542
-548
.
DOI: 10.3969/j.issn.10017216.2012.05.005
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