首页|期刊导航|中国农业科学（英文版）|Studies on the Growth Habits and Characteristics of Two Polyploid Indica-Japonica Hybrid Rice with Powerful Heterosis
中国农业科学（英文版）2007，Vol.6Issue(3)：265-274,10.
Studies on the Growth Habits and Characteristics of Two Polyploid Indica-Japonica Hybrid Rice with Powerful Heterosis
Studies on the Growth Habits and Characteristics of Two Polyploid Indica-Japonica Hybrid Rice with Powerful Heterosis
摘要
Abstract
Based on a series of polyploid indica-japonica hybrid plant lines obtained from a new breeding strategy of using double predominance of wide cross and polyploidization to breed super rice, two polyploid indica-japonica hybrids, PSR073 and PSR120 were studied in their growth periods to show the powerful heterosis in a larger scale and to study the characteristics of polyploid indica-japonica hybrids more elaborately. The leaf age, tiller growth, flowering habits, and agronomic traits of them were observed to analyze their growth habits and characteristics. The results showed that the.agronomic traits of PSR073 and PSR 120, such as the plant height, panicle length, grain length, grain width, and 1000-grain weight, all acquired obvious predominance of polyploidy, and that the seed setting rate was more than 83%. No significant difference was observed between the two tetraploids and common diploids in the leaf age, tiller growth, and flowering habits. It was concluded that the characteristics of the two powerful heterosis polyploid hybrids were different from those of the polyploid rice reported earlier. Wide cross and polyploidization had no negative effects on their growth habits and characteristics; on the contrary these had powerful heterosis. This had provided theoretic and practical evidences for their application to agricultural production.关键词
polyploid/indica-japonica hybrids/growth habits and characteristics/heterosis/seed setting rateKey words
polyploid/indica-japonica hybrids/growth habits and characteristics/heterosis/seed setting rate分类
农业科技引用本文复制引用
SONG Zhao-jian,DU Chao-qun,DAI Bing-cheng,CHEN Dong-ling,CHEN Jian-guo,CAI De-tian..Studies on the Growth Habits and Characteristics of Two Polyploid Indica-Japonica Hybrid Rice with Powerful Heterosis[J].中国农业科学（英文版）,2007,6(3):265-274,10.基金项目
The study was supported by National Natural Science Foundation of China (39970447, 30240090, 30471063 and 30650002) and National 863 Program of China (SZ-01-02-02). （39970447, 30240090, 30471063 and 30650002）
