草地早熟禾种子产量相关性状的通径分析

Path-coefficient Analysis of Seed Yield with Some Agronomic Characters of Poa pratensis

对草地早熟禾的4个主要农艺性状与种子产量进行了相关、回归和通径分析。结果表明,各相关性状与单株种子产量的相关系数大小为有效穗数>每穗穗粒数>穗长>千粒重;4个相关性状对单株种子产量的直接效应大小为:有效穗数>穗粒数>千粒重>穗长。提高草地早熟禾单株种子产量应首先考虑有效穗数的增加。

The correlation, regression and path coefficient of 4 agronomic characters and seed yield per plant of Poa pratensis were studied in this paper. The results showed that the correlated coeffient of correlated characters and seed yield per plant was arranged orderly like this： effective ear number〉number of ear grains〉ear length〉weight of thousand grains, and the direct effect of 4 correlated characters on seed yield per plant was ordered below： effective ear number〉number of ear grains〉weight of thousand grains〉ear length. Increasing ear number played a key role in improving seed yield per plant ofpoa pratensis.