RICE SCIENCE ›› 2010, Vol. 17 ›› Issue (4): 288-295 .DOI: 10.1016/S1672-6308(09)60029-9

• Research Paper • Previous Articles     Next Articles

Relationship Between Heterosis and Parental Genetic Distance Based on Molecular Markers for Functional Genes Related to Yield Traits in Rice

ZHANG Tao1, 2; NI Xian-lin1, 3; JIANG Kai-feng1, 2; DENG Hua-feng4; HE Qing4; YANG Qian-hua1; YANG Li1, 2; WAN Xian-Qi1; CAO Ying-jiang1; ZHENG Jia-kui1, 2, 3   

  1. 1)Rice and Sorghum Research Institute, Sichuan Academy of Agricultural Sciences, Deyang 618000, China; 2)Luzhou Branch of Chinese National Center for Rice Improvement, Luzhou 646000, China; 3College of Bioengineering, Chongqing University, Chongqing 400044, China; 4)China National Hybrid Rice R & D Center, Changsha 410125, China
  • Received:2009-12-08 Online:2010-12-28 Published:2010-12-28
  • Contact: ZHENG Jia-kui
  • Supported by:
    the National High Technology Research and Development of China (Grant No. 2009AA101101); the China National Jumping Plan of Agricultural Technology and Science; the Tackling Key Subject of Rice Breeding in Sichuan Province, China (Grant No. YZGG2006-1); and the Youth Foundation of Sichuan Academy of Agricultural Sciences, China (Grant No. 2008QNJJ).

Abstract: The genetic distances among 18 cytoplasmic male sterile lines and 11 restorer lines were analyzed with molecular markers derived from yield-related functional genes. The correlation between parental genetic distance and heterosis was investigated by analyzing the performance of 47 combinations. The results showed that the genetic distance was significantly correlated with yield heterosis (r=0.29*), but not significantly correlated with heterosis for other traits, such as number of effective panicles per plant, seed setting rate, 1000-grain weight, number of grains per panicle and theoretical yield. However, the correlation coefficient was so small that the parental genetic distance could not to be used to predict heterosis.

Key words: rice, yield related traits, simple sequence repeats, genetic distance, heterosis, correlation