| 多倍体化引起植物表型突变的分子机理研究 |
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| 引用本文： | 程治军,秦瑞珍,张欣,雷财林,郭秀平,万建民.多倍体化引起植物表型突变的分子机理研究[J].作物学报,2005,31(7):940-943. |
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| 作者姓名： | 程治军 秦瑞珍 张欣 雷财林 郭秀平 万建民 |
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| 作者单位： | 中国农业科学院作物科学研究所, 北京100081 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 多倍体化后经常出现一些新的表型；但是，大量的表型变异发生的原因一直不清楚。 最近人们对拟南芥菜、棉花、小麦、油菜等人工合成四倍体的研究, 为理解这种表型变异的机制提供了线索。初步结果表明,无论同源多倍体还是异源多倍体化后, 既有基因的甲基化也有基因的脱甲基化, 某些甲基化状态的改变可以重复且独立发生。这些甲
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| 关 键 词： | 多倍体 甲基化 突变体 水稻 |
| 收稿时间： | 2004-09-27 |
| 修稿时间： | 2004年9月27日 |
Molecular Mechanism for Phenotypic Mutation Arisen from Polyploidization in Plant |
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| CHENG Zhi-jun,QIN Rui-Zhen,ZHANG Xin,LEI Cai-Lin,GUO Xiu-Ping,WAN Jian-Min.Molecular Mechanism for Phenotypic Mutation Arisen from Polyploidization in Plant[J].Acta Agronomica Sinica,2005,31(7):940-943. |
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| Authors: | CHENG Zhi-jun QIN Rui-Zhen ZHANG Xin LEI Cai-Lin GUO Xiu-Ping WAN Jian-Min |
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| Institution: | Institute of Crop Sciences, Chinese Academy of Agriculture Sciences, Beijing 100081 |
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| Abstract: | Polyploidy can induce mutants with new phenotypes, but the molecular mechanism of mutation is poorly understood. Recent studies on artificial tetraploids of Arabidopsis, cotton, wheat, and canola have provided the way for understanding its mechanism. Preliminary results indicated that some gene silences due to DNA hypermethylation or hypomethylation were frequently caused by either autopolyploids or allopolyploids, and the hypermethylation genes could be reactivated by azadC, a demethylating agent. Further study on hypermethylation would be required for better understanding the mechanism of polyploidization. This paper also discussed the possibility to obtain hypermethylation mutant from autotetraploidy rice. |
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| Keywords: | Polyploidy Methylation Mutant Rice |
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