论文部分内容阅读
通过人工授粉方法研究栽培稻与二倍体和四倍体野生稻之间的可交配性。以栽培稻为对照,用光学显微镜观察不同野生稻花粉在同一栽培种柱头上的萌发生长情况。结果表明,在栽培稻柱头上普通野生稻(AA)花粉萌发最好,与对照萌发情况相近。药用野生稻(CC)萌发差,表现为柱头上花粉附着量少,开始萌发时间迟,萌发量少,花粉管扭曲、缠绕、伸长慢等。四倍体野生稻未观察到有萌发现象。说明普通野生稻与栽培稻亲缘关系近,可交配性好;药用野生稻与栽培稻可交配性差;四倍体野生稻与栽培稻可交配性极差。由此推断,转基因水稻与普通野生稻通过花粉途径发生基因漂移的可能性很大,而与药用野生稻和其他基因组野生稻发生基因漂移的可能性很小。
Study on the Crossability between Cultivated Rice and Diploid and Tetraploid Wild Rice by Artificial Pollination Method. Using cultivated rice as control, the germination and growth of different wild rice pollens on the stigma of the same cultivar were observed under light microscope. The results showed that pollen germination of common wild rice (AA) in cultivated rice stigma was the best, similar to the control. The medicinal wild rice (CC) germinated poorly, which showed as follows: less pollen on the stigma, delayed germination time, less germination, twisting, twisting and elongation of the pollen tube. Tetraploid wild rice did not observe germination. The results showed that common wild rice had close genetic relationship with cultivated rice and good mating ability. The compatibility between wild and cultivated wild rice was poor. The incompatibility of tetraploid wild rice and cultivated rice was very poor. It is concluded that there is a high possibility that genetically modified rice and wild rice may pollen via gene pollination, while the possibility of genetic drift with medicinal wild rice and other genomic wild rice is less likely.