杂交稻“汕优63”父、母本不同播期生育规律的观察研究

本试验采用不同的播种时期,研究了杂交稻“汕优63”父母本在信阳地区的个体生长发育规律。结果表明:(1)父本“明恢63”在四个不同播期中,主茎叶片数摇摆在17.6～18片之间。第一苞原基分化始期,主茎叶令余数为3.7。第一苞原基分化至始穗为34天。(2)母本“珍汕97A”在较好的栽培条件下,主茎叶片数为12～13片,在较差的条件下,主茎叶片数为13～14片。

Observation And Stndy on the Growth Regularities of the Parents of Hybrid Rice Xian You63 in the Different Sowing Time

By means of using the different sowing time of the male parent and female parent of the hybrid rice Xian You 63,their ontogenetic regularities were stuolied in xing yang Henan. The results were as follows: 1 > In the four different sowingtimes of the male parent Ming Hui 63,the main stems leaves were ranged 17.6 to 18.In the initiation of inflorescence prim-ordium, the remnant leaves of the main sterm were 3.7. Theduration from the initiation of the inflorscence primordium to heading was 34 days. 2 . The main stem leaves of the female parent Zheng Xian 97A were mostly from 12 to 13 under the well cultivation condition and from 13 to 14 under the poor cultivation condition.