Responses of Rice Genotypes Carrying Different Dwarf Genes to Fusarium moniliforme and Gibberellic Acid

Plant Production Science

Zhijuan Ji¹  Ximing Li¹  Jieyun Zhuang¹  Changdeng Yang¹  Xudong Zhu¹  Yingwu Xia²  Jinsong Bao²  Liangyong Ma² 

[1] China National Rice Research Institute;Institute of Nuclear Agricultural Sciences, Zhejiang University, Hua Jiachi Campus;

关键词: Bakanae disease;    Dwarf gene;    Gibberellic acid;    Oryza sativa L;    Rice;    Sd1.;   

DOI  :  10.1626/pps.11.134

来源: DOAJ

【 摘 要 】

A total of 32 rice genotypes carrying different dwarf or semi-dwarf genes were inoculated with the fungus Fusarium moniliforme Sheldon or treated with 50 mg l-1 GA3 in order to select resources resistant to rice bakanae disease from the dwarf materials. The length of the elongated seedlings was measured, and the percentage of death of the seedlings after transplanting to field was also counted. A significant correlation was found between the length of the seedling treated with GA3 and disease injury by bakanae fungus. Rice materials carrying dwarf gene such as sd1 were not only sensitivity to GA3 but also susceptive to rice bakanae disease. Materials carrying dwarf gene d1 were insensitive to GA3 but susceptive to bakanae. On the other hand, all materials carrying d29, sd6 or sdq(t) genes showed resistance to bakanae. The present study indicated that dwarf and semi-dwarf rice materials might be useful resources for improvement of bakanae resistance in rice breeding programs.

【 授权许可】

Unknown