水稻亚种间杂种的分类与利用

应用程氏指数法分析和划分１３个亲本和４８个亚种间组合（Ｆ１）的籼粳属性表明：　原认为是爪哇型的ＣＰＳＬＯ１７应归属偏粳型；亚种间Ｆ１可以划分为４类．即粳、偏粳、籼和偏籼，但主要以偏粳和偏籼为主，完全为粳型或籼型的极少；亲本细胞质对Ｆ１分类的影响非常明显；在育种实践中，欲选育籼型杂交稻组合时，以籼稻为母本容易成功，反之亦然。

Classification of Rice Intersubspecific F_1 Hybrids and Its Utilization

parents and 48 F1 hybrids between O. satin index and O. sativa japonica were classified by use of Chen's method. CPSLO17 considered as javanica was identified to be japonicaclinous. The hybrids were classified into four types as japonica, haponicaclinous, indica and indicaclinous by the method. Most of them were japonicaclinous and indicaclinous. Few were japonica and indica. The cytoplasm of the parents had a significant effect on the classifcation of F1. In intersubspecific hybrid rice breeding, it would be better to use an indica variety as the female parent if an indica hybrid is desired,and vice versa.