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

作　　者：LIU Bin-mei CHENG Can Wu Yue-jin TONG Ji-ping WU Jin-hua ZHANG Ying YUAN Qin 

机构地区：[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 23003I, China [4]College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan430074, China

出　　处：《Rice science》2006年第3期179-184,共6页水稻科学（英文版）

基　　金：This work was supported by the grants of National Natural Science Foundation of China(No.3037863);Natural Science Foundation of Anhui Province,China(No.01041103).

摘　　要：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.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.

关 键 词：semi-dwarf gene near isogenic lines plant height internode length sensitivity gibberellic acid RICE 

分 类 号：S511[农业科学—作物学]