摘要
利用5个杂交组合的F1、F2代及其亲本为试验材料,调查了25个水稻茎叶及穗部性状。试验结果表明,产量与株高、分蘖数和倒二叶长、剑叶长和倒三叶张角呈极显著或显著的正相关;与穗曲度、穗长、穗重、二次枝梗优势节位、一次和二次枝梗粒数、千粒重、一次枝梗和二次枝梗结实率均呈极显著或显著的正相关。株高、分蘖数、二次枝梗粒数、一次枝梗结实率和二次枝梗结实率对产量产生较大的直接效应,而其他性状对产量的直接效应小。以株高、分蘖、穗重、二次枝梗结实率、二次枝梗优势节位等5个性状所构建的选择指数,对产量有较高的选择效率。
Twenty five traits associated with straw and leaf and panicle were evaluated, by using F1 and F2 derived from five combinations and their parents. The result showed that the yield were positively and significantly at 0.01 or 0.05 level correlated with the plant height, tillers per plant, last second leaf length, flag leaf length and last third leaf opening angle; and the yield were positively and significantly at 0.01 or 0.05 level correlated with the shape of panicle, panicle length, panicle weight, sitting of most second branch, spikelet of first and second branch, 1 000 grain weight, seed setting rate of first and second branch. Plant height, tillers per plant, spikelet of second branch, seed setting rate of first and second branch have exerted direct effect on yield, while the other traits have smaller effects on yield. Constructing a selection index by plant height, tillers per plant, panicle weight, seed setting rate of second branch, the dominant node with the most of second branch, can enhance the selection efficiency to yield.
出处
《中国农业科技导报》
CAS
CSCD
2008年第4期48-55,共8页
Journal of Agricultural Science and Technology
基金
作物种质资源保护项目[NB06-070401(22-27)-01]
国家科技基础条件平台项目(2005DKA21001-01)资助
关键词
水稻
株型
产量
相关
通径
选择指数
rice
plant type
yield
correlation
path coefficient
selection index
