籼型杂交稻米垩白性状频数分布及其与亲本的关系  

STUDY ON THE FREQUENCY INDEX OF CHALKINESS IN INDICA—TYPE HYBRID RICE AND THE RELATIONSHIP WITH ITS PARENTS

作　　者：朱碧岩[1] 王长发[2] 

机构地区：[1]华南师范大学生物系,广州510631 [2]西北农业大学农学系,陕西杨陵712100

出　　处：《华南师范大学学报（自然科学版）》1997年第3期81-86,共6页Journal of South China Normal University(Natural Science Edition)

摘　　要：研究结果表明 :籼型杂交稻米垩白面积指数为连续分布 ,分布曲线为单峰或不明显的双峰 ,在主峰与低谷之间的发生频率差别不大 ,说明杂交稻米垩白性状发生了广泛的分离 ;在大垩白 /大垩白或大垩白 /中垩白的组合中 ,其分布主峰在大垩白或中垩白处 .大垩白 /小垩白或中垩白 /小垩白的组合中 ,其分布因组合不同而异 ,但尽管主峰在无垩白处的组合中 ,大垩白或中垩白仍有相当的分布 ,而在小垩白 /小垩白的组合中 .不仅其主峰在无垩白处 ,且大、中垩白的出现频率也很低 .上述结果说明 。The experiment was conducted with eighteen hybrid combinations of indica type hybrid rice (ITHR) to study their frequency distribution of chalkiness index and the relationship with their parents.The results are as follow:1) the frequency distribution of chalkiness index of ITHR was continuous and the distibution curves had a single peak or a double peak.The frequencies at peak and valley of the distribtuion curves had no significant difference between them.This shows the chalkiness index of ITHR had wide segregation. 2)The frequency distribution of ITHR was related with parents.In the hybrid combinations of big chalkiness/big chalkiness or big chalkiness/mid chalkiness,the frequency distribution concentrated on big and mid chalkiness,But in the hybried combinations of small chalkiness/small chalkiness of mid chalkiness/small chalkiness,the frequency distribution concentrated on zero and small chakkines.3)The chalkiness index of ITHR was difficult.but not impossible,to reach high degrees of of the appearance quality as that of the general superior varieties. By choosing parents with zero or small chalkiness,high degree of appearance quality of ITHR could be achieed.

关 键 词：籼型杂交稻 垩白 频数分布 水稻 

分 类 号：S511.035.1[农业科学—作物学]