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Mapping QTLs for Drought Tolerance at Seedling Stage in Rice Using Doubled Haploid Population

作  者:
Qun Xu;Xiaoping Yuan;Hao Yu;Yiping Wang;Shuangshuang Tang;Xinghua We
单  位:
State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, Chin;State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
关键词:
rice;drought tolerance;doubled haploid population;quantitative trait locu
摘  要:
QTLs for drought tolerance at the rice seedling stage were analyzed using a doubled haploid (DH) population consisted of 251 lines from the cross between a japonica parent Maybelle and an indica parent Baiyeqiu. A genetic linkage map with 226 SSR marker loci was constructed. Single-locus analysis following composite interval mapping (CIM) detected a total of five QTLs located on five different chromosomes of rice. Four QTLs were also detected following two-locus analysis, resolving two pairs of epistatic QTLs (E-QTLs) with positive and additive genetic effects. The results indicated that the alleles from the parent Baiyeqiu contributed DH population to improve drought tolerance at the seedling stage.

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