RICE SCIENCE ›› 2006, Vol. 13 ›› Issue (3): 179-184 .

• Research Paper • Previous Articles     Next Articles

Effect of Dominant Semi-Dwarf Gene on Plant Height and Its Related Traits and Sensitivity to Gibberellic Acid in Rice

LIU Bin-mei 1, CHENG Can 2, WU Yue-jin 1, 3, TONG Ji-ping 3, WU Jin-hua 4, ZHANG Ying 1, 3, YUAN Qin 2   

  1. 1 Key Laboratory of Ion Beam Bioengineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; 2 Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; 3 Institute of Rice Research, Anhui Academy of Agricultural Sciences, Hefei 230031, China; 4 College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2005-11-30 Online:2006-09-28 Published:2006-09-28
  • Contact: WU Jin-hua
  • Supported by:
    the grants of National Natural Science Foundation of China (No.3037863) and Natural Science Foundation of Anhui Province, China (No. 01041103).

Abstract: Six pairs of tall and dwarf near-isogenic lines derived from a dominant semi-dwarf mutant (Y98149) were selected to study height expression and sensitivity to gibberellic acid (GA3). The lengths of the 4-5th internode, the 3rd, 2nd, 1st internodes from the top and the panicle length in the six dwarf near isogenic lines were 97.2%, 53.3%, 65.1%, 61.9% and 94.7% of those in the six tall ones, respectively, indicating that the dominant semi-dwarfing gene significantly inhibited the internode elongation. Moreover, Y98149 (mutant type) was more sensitive to GA3 than Y98148 (wild type), and had a lower GA3 concentration in plant, about 78% of Y98148.

Key words: semi-dwarf gene, near isogenic lines, plant height, internode length, sensitivity, gibberellic acid, rice