Characterization and mapping of a new male sterility mutant of anther advanced dehiscence (t) in rice |
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作者单位: | Yi Zhang (Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture,Southwest University,Chongqing 400716,China) ;
Yunfeng Li (Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture,Southwest University,Chongqing 400716,China) ;
Jian Zhang(Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture,Southwest University,Chongqing 400716,China) ;
Fucheng Shen(Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture,Southwest University,Chongqing 400716,China) ;
Yuanxin Huang(Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture,Southwest University,Chongqing 400716,China) ;
Zhiwei Wu(Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture,Southwest University,Chongqing 400716,China) ; |
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基金项目: | the Natural Science Foundation Project CQ CSTC,重庆市教委资助项目 |
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摘 要: |
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关 键 词: | 雄性不育 花粉囊裂开 水稻 基因图谱 |
Characterization and mapping of a new male sterility mutant of anther advanced dehiscence (t) in rice |
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Authors: | Yi Zhang Yunfeng Li Jian Zhang Fucheng Shen Yuanxin Huang Zhiwei Wu |
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Institution: | Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture,Southwest University,Chongqing 400716,China |
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Abstract: | Anther dehiscence is very important for pollen maturation and release.The mutants of anther dehiscence in rice (Oryza sativa L.) arefew,and related research remains poor.A male sterility mutant of anther dehiscence in advance,add(t),has been found in Minghui 63 and its sterility is not sensitive to thermo-photo.To learn the character of sterilization and the function of the add(t) gene,the morphological and cytological studies on the anther and pollen,the ability of the pistil being fertilized,inheritance of the mutant,and mapping of add(t)gene have been conducted.The anther size is normal but the color is white in the mutant against the natural yellow in the wild-type.The pollen is malformed,unstained,and small in the KI-I2 solution.The anther dehiscence is in advance at the bicellular pollen stage.A crossing test indicated that the grain setting ratio of the add(t) is significantly lower than that of the CMS line 2085A.The ability of the pistil being fertilized is most probably decreased by the add(t) gene.The male sterility is controlled by a single recessive gene of add(t).This gene is mapped between the markers of R02004 (InDel) and RM300 (SSR) on chromosome 2,and the genetic distance from the add(t) gene to these markers is 0.78 cM and 4.66 cM,respectively. |
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Keywords: | male sterility sterility character gene mapping rice |
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