Identification of stably expressed QTL for heading date using reciprocal introgression line and recombinant inbred line populations in rice
文献类型： 外文期刊
作者： Cheng, Li-Rui 1 ; Wang, Jun-min 3 ; Ye, Guoyou 4 ; Luo, Cheng-Gang 1 ; Xu, Jian-Long 2 ; Li, Zhi-Kang 2 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Tobacco Sci, Qingdao 266101, Peoples R China
2.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China
3.Zhejiang Acad Agr Sci, Hangzhou 310021, Zhejiang, Peoples R China
4.Int Rice Res Inst, Manila, Philippines
期刊名称：GENETICS RESEARCH （ 影响因子：1.588； 五年影响因子：1.263 ）
ISSN： 0016-6723
年卷期： 2012 年 94 卷 5 期
页码：
收录情况： SCI
摘要： Two sets of reciprocal introgression lines (ILs) and a population of recombinant inbred lines (RILs) derived from the cross between japonica cultivar Xiushui09 and indica breeding line IR2061-520-6-9 (abbreviated as IR2061) were used to identify QTL for heading date (HD). Phenotyping was conducted in Hainan Island for two winter seasons (2007 and 2009). Nine QTLs were detected in the ILs with Xiushui09 background (XS-ILs), and four of which were repeatedly mapped across 2 years. Five QTLs were identified in the ILs with IR2061 background (IR-ILs), and three of which were commonly detected in 2 years. All commonly detected QTL had the same direction of gene effect. Seven QTL for HD were identified in the RILs in 2009. Only three (25%) QTLs were commonly detected using all the three populations (XS-ILs, IR-ILs and RILs). The number of commonly identified QTLs among populations was related to degree of similarity of their genetic backgrounds, suggesting that the genetic background effect is important for detecting HD QTL. QHd7 and QHd10b stably expressed in different populations and across years thus would be exploited in rice breeding programme. Moreover, lines with both of QHd7 and QHd10b resulted in at least 3 days earlier than lines with only one of them QTL, showing evident pyramiding effect.
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