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Acta Agron Sin ›› 2008, Vol. 34 ›› Issue (11): 1869-1876.doi: 10.3724/SP.J.1006.2008.01869

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS •     Next Articles

Quantitative Trait Loci for Rice Heading Time in Koshihikari

ZHANG Yong-Sheng1,JIANG Ling1,LIU Xi1,CHEN Liang-Ming1,LIU Shi-Jia1,ZHAI Hu-Qu2,WAN Jian-Min12*   

  1. 1 State Key Laboratory of Crop Genetics and Germplasm Enhancement / Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing 210095, Jiangsu; 2 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081; 3 Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2008-04-21 Revised:1900-01-01 Online:2008-11-13 Published:2008-09-05
  • Contact: WAN Jian-Min

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Abstract:

In order to verify the quantitative trait loci for rice heading time in Koshihikari, QTL mapping of heading time was studied using both Koshihikari/Kasalath BILs population and Kasalath/Koshihikari CSSLs population in Nanjing, Jiangsu province and Lingshui, Hainan province. The results indicated that three QTL of heading time were detected, which were located on chromosomes 3, 6, and 8, respectively. At qHd-3 and qHd-8 loci, the allele from Koshihikari can promote heading time for rice, but at qHd-6 loci, the allele from Koshihikari could delay heading time for rice. Epistatic interaction was detected between qHd-3 and the QTL located on chromosome 7. Comparing BILS with CSSLs linkage maps, we found that the marker regions of qHd-3, qHd-8, and qHd-7-1 coincided with Kasalath segment in W008, W023 and W024, W020, respectively. Meanwhile, QTL mapping of heading time were studied using Koshihikari/Guichao 2 RILs population, three additive QTL were detected and epistatic interaction was detected between two unadditive QTL of heading time.

Key words: Rice (Oryza sativa L.), Heading date, QTL, Gene mapping, Epistatic interaction

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