| Studies on the Growth Habits and Characteristics of Two Polyploid Indica-Japonica Hybrid Rice with Powerful Heterosis |
| |
| 作者姓名： | SONG Zhao-jian DU Chao-qun DAI Bing-cheng CHEN Dong-ling CHEN Jian-guo CAI De-tian |
| |
| 作者单位： | College of Life Science, Hubei University, Wuhan 430062, P.R.China |
| |
| 基金项目： | 国家自然科学基金;国家高技术研究发展计划(863计划) |
| |
| 摘 要： |
|
| 关 键 词： | 杂交水稻 生长习性 杂交优势 发芽率 多倍体 |
Studies on the Growth Habits and Characteristics of Two Polyploid Indica-Japonica Hybrid Rice with Powerful Heterosis |
| |
| 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].Agricultural Sciences in China,2007,6(3):265-274. |
| |
| Authors: | SONG Zhao-jian DU Chao-qun DAI Bing-cheng CHEN Dong-ling CHEN Jian-guo CAI De-tian |
| |
| Institution: | College of Life Science, Hubei University, Wuhan 430062, P.R. China |
| |
| 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 flee, 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 PSR120, 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. |
| |
| Keywords: | polyploid indica-japonica hybrids growth habits and characteristics heterosis seed setting rate |
| 本文献已被 维普 万方数据 ScienceDirect 等数据库收录！ |
