摘要
通径分析表明，对于杂交水稻春秋双季制种产量的相对重要住的性状依次为结实率＞每亩穗数＞每穗总粒数＞千粒重＞剑叶长＞株高．通过建立产量与其构成因素穗数、结实率、总粒数和千粒重的多元回归方程式，因地制宜设计出了有关杂交组合，规范双季制种的穗粒结构量化指标．讨论了实现有关量化指标的技术措施。
The yield of hybrid rice seed production in spring and autumn has stagnated for a long time ,The path analysis has showed that the relative importance in yield components in seed production is seed set rote〉panicles per mu〉grains per panicle〉1000-grain-weight〉flag leaf length〉plant height, so emphasis should he placed on increase of panicles per mu and grains per panicle as well as enhancement of seed set rate. But the climate during seed production in spring or autumn has its specific character. The humidity at the flowering time of seed production in spring is rather high, and that in autumn is quite the contrary. In order to enhance the outcrossing rote, the following techniques may be adopted ： when 15% of panicles emerges in seed production in spring , patting the bracts to remove dew drops can result in decrease of humidity and raise of temperature , thus making the flowering time to he earlier, when seed production inautumn is conducted, use of a high-pressure sprayer to spray cold water can result in increase of humidity , thus prolonging the vitality of pollens and stigmas .
出处
《杂交水稻》
CSCD
北大核心
1993年第5期20-22,共3页
Hybrid Rice
关键词
杂交水稻制种
产量
通径分析
量化指标
hybrid floe seed production
yields
path analysis
quantitative criteria
