Genetic Identification of a New Small Grain Dwarf Gene in Rice

作     者：WU Cheng~1, LI Xiu-lan~2, DENG Xiao-jian~(1,2), WANG Ping-rong~2, LI Ren-duan~2, YANG Zhi-rong~1 (~1 College of Life Science, Sichuan University, Chengdu 610064, China ~2 Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China) 

出 版 物：《Rice Science》 (水稻科学(英文版))

年 卷 期：2003年第Z1期

页      面：11-15页

学科分类：09[农学] 0901[农学-作物学] 

主　　题：rice dwarf gene genetic identification genetic marker gene location near isogenic line 

摘      要：The plant material used in the study was rice line 162d, a new small grain dwarf mutant. Polymorphic analysis of 221 SSR loci demonstrated that 162d derived from a semidwarf variety Shuhui 162 through mutation, and 162d and Shuhui 162 were just a pair of near isogenic lines. Genetic analysis of F1and F2populations suggested that dwarfism in 162d was controlled by a single recessive gene. Phenotypic characteristics of the mutant gene were that plant height was about a quarter of normal height, grain size about a quarter of normal size, leaf was short and broad, and seed setting rate was very low, compared with the near isogenic line Shuhui 162. The mutant gene was sensitive to gibberellin （GA3） treatment and did not located on the region near the centromere of rice chromosome 5, where dl gene located. Therefore, it was concluded that the mutant gene of 162d was a new small grain dwarf gene in rice.