四川省2001—2010年审定的杂交水稻中籼迟熟品种的农艺性状分析

Analysis of Agronomic Characters of Late-Maturity Indica Hybrid Rice Varieties Registered from 2001 to 2010 in Sichuan

该文对2001—2010年四川省审定的杂交水稻中籼迟熟品种的农艺性状进行多元分析.结果表明:结实率是极为活跃和重要的因素;其次是稻瘟病病级;之后是全生育期、株高、穗数、粒数和粒质量.因此,四川省杂交水稻中籼迟熟品种的高产育种方向应是在保持现有全生育期的状态下,适当降低株高,在主攻结实率的同时,协调好穗数和粒质量,强化抗性选择.

Multivariate analysis was made of the agronomic characters of the late-maturity indica hybrid rice varieties registered from 2001 to 2010 in Sichuan.The results showed that seed setting was the most active and important factor,followed in order by rice blast class,the whole growth duration,plant height,effective panicles,grain number per panicle and 1000-grain-weight.Therefore,the major targets in breeding for late-maturity indica hybrid rice varieties in Sichuan should be a proper reduction in plant height without changing the current whole growth period.While putting the focus on better seed-set,we should coordinate panicle number and grain weight and pay more attention to disease resistance.