论文部分内容阅读
为提高温敏两系水稻的杂交结实率 ,1999年 2月在海南省三亚对不育系抽穗后剪颖分期授粉研究结果表明 ,不育系剪颖后第 3d授粉 ,杂交结实率最高 ,达 79 4% ;以后渐次递减 ,不育系剪颖后第 12d授粉 ,杂交结实率仅有1 2 %。因此 ,温敏两系杂交稻的制杂最佳授粉时间为 :母本剪颖后第 2d至第 5d中的任何一天授粉 ,可保证杂交结实率在 6 0 %以上 ,其中以第 3d或第 4d授粉 ,杂交结实效果较好。
In order to improve the seed setting rate of two-temperature sensitive rice, the results of staged pollination by scissors after heading in Sanya, Hainan Province in February 1999 showed that the pollination rate was the highest 79 4%; After gradually decreased, CMS sterile lines 12d pollination, hybrid seed setting rate of only 12%. Therefore, the thermo-sensitive two-line hybrid rice hybrid system of the best pollination time: 2 days to 5d after female parent shear pollination on any one day to ensure that the hybrid seed setting rate of 60% or more, of which the first 3d or 4d pollination, hybrid fruiting better.