摘要
对目前海南最大的普通野生稻居群——万宁普通野生稻居群的花期、花时、结实率和花粉育性进行了调查研究。结果发现,该普通野生稻居群内东部和西部群体花期相差15 d;东部群体单穗平均结实率为8.67%,西部群体单穗平均结实率达62.1%,呈极显著差异;而东部和西部群体的花时基本相同,花粉育性与栽培稻均无显著差异。该居群东部群体与毗邻再生栽培稻的花期相遇,花时一致,满足基因漂移发生的部分必须条件。虽然目前尚无充分证据证明普通野生稻与其毗邻的栽培稻有基因漂移发生,但出于野生稻保护的需要,转基因水稻种植应设置安全距离,避开该野生稻分布区域。
Oryza rufipogon population in Wanning city is the largest one in Hainan Province. In order to determine the possibility of gene flow from cultivated rice to wild rice, the flowering date, daily opening time, seed set- ting rate and pollen fertility of the Oryza rufipogon were investiged. The results indicated that the eastern and western sub-populations had obviously differences on many habits. The flowering of the eastern sub-population was 15 days earlier than the western sub-population. The average seed setting rate was 8.7% in the eastern sub-population, while that in the western sub-population was 62. 1%. Statistics analysis showed that they had significant difference at 1% level. Nevertheless, the daily opening time and pollen fertility between the two sub-populations almost had no significant difference. The flowering date and opening time in the eastern sub-population met with the close-by regenerating Oryza sativa. Although the existing conditions fit to gene flow, it could not be concluded that gene flow happened between the Oryza rufipogon population and the close-by regenerating Oryza sativa in nature. However, for the requirement of wild rice conservation, it＇s necessary to design isolation distance between Oryza rufipogon population and transgenic rice varieties released in this area.
出处
《植物遗传资源学报》
CAS
CSCD
2008年第2期218-222,共5页
Journal of Plant Genetic Resources
基金
农业结构调整重大技术研究专项(06-11-03B)
