| Initial Study on Sichuan Apomixis Rice (SAR-1) |
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| 引用本文： | 周开达,汪旭东,罗明,高克明,周绍莉,严志彬,李平,陈放,周桂梅. Initial Study on Sichuan Apomixis Rice (SAR-1)[J]. 中国科学B辑(英文版), 1993, 0(4) |
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| 作者姓名： | 周开达 汪旭东 罗明 高克明 周绍莉 严志彬 李平 陈放 周桂梅 |
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| 作者单位： | Rice Research Institute of Sichuan Agricultural University，Wenjiang 611130，PRC，Rice Research Institute of Sichuan Agricultural University，Wenjiang 611130，PRC，Rice Research Institute of Sichuan Agricultural University，Wenjiang 611130，PRC，Rice Research Institute of Sichuan Agricultural University，Wenjiang 611130，PRC，Rice Research Institute of Sichuan Agricultural University，Wenjiang 611130，PRC，Rice Research Institute of Sichuan Agricultural University，Wenjiang 611130，PRC，Department of Biology，Sichuan University，Chengdu 610064，PRC，Department of Biology，Sichuan University，Chengdu 610064，PRC，Department of Biology，Sichuan University，Chengdu 610064，PRC |
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| 基金项目： | Project supported by National Natural Science Foundation of China, Sichuan Science Committee, Sichuan Education Committee and Rockefeller Foundation. |
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| 摘 要： | SAR-1 is a new germplasm which was discovered in the breeding material of southern multiplication in spring, 1988. The material showing high sterility of pollens is able to set seeds spontaneously. Under isolation, the seed-setting highest rate may reach 55.33%. The florets emasculated by clipping spikelet and lukewarm water still set seeds at certain rates. The completely sterile florets, after being emasculated and checked under microscope one by one, still set seeds, and the highest setting rate is 41.80%. Cytoembryological research indicates that the egg of SAR-1, without fertilization, divides independently into an embryo, which follows the normal process to maturity. Adventitious embryos originate from ovary wall cells. Therefore, it is deduced that SAR-1 has multiple mechanisms of apomixis, and the unfertilized polar nuclei fuse and develop into endosperm cells. The endosperm provids the embryo with nutrient for development. The automatic formation of the endosperm is an obvious feature of SAR-1.
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Initial Study on Sichuan Apomixis Rice (SAR-1) |
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| ZHOU Kai-Da WANG Xu-Dong LUO Ming GAO Ke-Ming ZHOU Shao-Li YAN Zhi-Bin. Initial Study on Sichuan Apomixis Rice (SAR-1)[J]. Science in China(Chemistry), 1993, 0(4) |
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| Authors: | ZHOU Kai-Da WANG Xu-Dong LUO Ming GAO Ke-Ming ZHOU Shao-Li YAN Zhi-Bin |
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| Abstract: | SAR-1 is a new germplasm which was discovered in the breeding material of southern multiplication in spring, 1988. The material showing high sterility of pollens is able to set seeds spontaneously. Under isolation, the seed-setting highest rate may reach 55.33%. The florets emasculated by clipping spikelet and lukewarm water still set seeds at certain rates. The completely sterile florets, after being emasculated and checked under microscope one by one, still set seeds, and the highest setting rate is 41.80%. Cytoembryological research indicates that the egg of SAR-1, without fertilization, divides independently into an embryo, which follows the normal process to maturity. Adventitious embryos originate from ovary wall cells. Therefore, it is deduced that SAR-1 has multiple mechanisms of apomixis, and the unfertilized polar nuclei fuse and develop into endosperm cells. The endosperm provids the embryo with nutrient for development. The automatic formation of the endosperm is an obvious feature of SAR-1. The parthenogenesis of SAR-1 can inherit from generation to generation and be transferred to other materials genetically. |
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| Keywords: | rice apomixis embryology. |
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