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Molecular Tagging and Effect Analysis of a New Small Grain dwarf gene in Rice

Acta Botanica Sinica 2003年第7期45卷 757-761页

作者：李秀兰吴成邓晓建王平荣李仁端杨志荣四川农业大学水稻研究所成都611130 四川大学生命科学学院成都610064

Plant height is one of the important agronomic traits of rice. Over higher plant would easily result in plant lodging and output reducing. On the other hand, the dwarf varieties with proper plant height had higher lodging resistance and a greater harvest index, allowing for the increased use of nitrogen fertilizer. dwarf breeding had made a great breakthrough in the rice breeding. The breeding and extension of excellent dwarf varieties remarkably improved the yield potential of rice. Therefore, the plant height is still one of the focuses in rice genetic research.

关键词： Oryza sativa dwarf gene gene mapping microsatellite marker gene effect analysis

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genetic Identification of a New Small Grain dwarf gene in Rice

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Rice science 2003年第1期10卷 11-15页

作者： WuCheng LIXiu-lan DENGXiao-jian WANGPing-rong LIRen-duan YANGZhi-rong CollegeofLifeScience SichuanUniversityChengdu610064China RiceResearchInstitute SichuanAgriculturalUniversityChengdu611130China

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 F_1 and F_2 populations 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 (GA_3) 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.

关键词： rice dwarf gene genetic identification genetic marker gene location near isogenic line

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genetic Identification of a New Small Grain dwarf gene in Rice

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Rice Science 2003年第Z1期 11-15页

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)

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.

关键词： rice dwarf gene genetic identification genetic marker gene location near isogenic line

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