摘要
1990年和1991年,在13.3m^2群体条件下,5个水稻籼粳杂种一代稻谷产量为7.61～10.61t/hm^2,具明显的杂种优势,超中亲值13.96%～84.26%。籼粳杂种在生物学特性上主要表现为:由于每穗颖花量大而使库容量超中亲值27.68%～71.15%;叶面积指数大和叶面积延续时间长导致作物生长率较高,而使得生物学产量超中亲值11.79%～41.27%;经济系数不表现优势。在栽培和育种上宜将高而稳的结实率作为高产主要目标,稳定经济系数,保持适宜群体叶面积。
The comparative studies on biological characteristics were carried out in 13.3 m^2 colony between five indiea-japonica hybrids and its parents. Comparison with the average of its parent, those hybrids showed: significant heterosis over by 13.96%～84.26% in the grain yield, sink capacity over by 27.68%～71.15% because of its more spikelets per panicle, biomass over by 11.79%～41.27% based on its high crop growth rate that caused by leaf area index and leaf area day, and no heterosis in harvest index. The high and stable seed set should be the main objective for cultivation and breeding of the indica-japonica hybrid.
出处
《中国水稻科学》
CAS
CSCD
北大核心
1993年第4期205-210,共6页
Chinese Journal of Rice Science
基金
中国高技术研究发展计划资助
关键词
生物学
杂种一代
杂种优势
水稻
Biological characteristics
Heterosis
Indica-japonica hybrid
