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Acta Agron Sin ›› 2008, Vol. 34 ›› Issue (04): 551-556.doi: 10.3724/SP.J.1006.2008.00551

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

QTL and Epistasis for Low Temperature Germinability in Rice

JI Su-Lan1,JIANG Ling1,WANG Yi-Hua1,LIU Shi-Jia1,LIU Xi1,ZHAI Hu-Qu2,YOSHIMURA Atsushi3,WAN Jian-Min12*   

  1. 1 State Key Laboratory for Crop Genetics & Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu; 2 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3 Faculty of Agriculture, Kyushu University, Fukuoka 812-8581, Japan
  • Received:2007-09-17 Revised:1900-01-01 Online:2008-04-12 Published:2008-04-12
  • Contact: WAN Jian-Min

Abstract: High germination ability at relatively low temperature is essential for direct-seeding rice varieties. A recombinant inbred line population (RILs), derived from a cross between varieties Kinmaze (japonica) and DV85 (indica) was used to detect QTL for low temperature germinability (LTG). The germination rate at 15℃ after 10 d germination culture in Nanjing, Jiangsu Province, and in Lingshui, Hainan Province, in 2002 and in Nanjing in 2003 was taken as LTG indicator. A total of 11 QTL on
chromosomes 2, 5, 7, 8, 11, and 12 were detected in the above three seed production environments. Of these, QTL on
chromosomes 7 and 11 mapped in similar genomic regions in all experiments and the maximum percentage of phenotypic variation explained (PVE) by each QTL was 27.93%, while epistatic interaction had slightly low PVE.

Key words: Rice, RIL population, Low temperature germinability, QTL analysis

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