草坪型多年生黑麦草种子产量与主要农艺性状的通径分析

Path-coefficient Analysis of Seed Yield with Some Agronomic Characters in Turf-type Lolium perenne L.

对草坪型多年生黑麦草6个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,种子产量与株高相关不显著,而与另5个性状均呈显著正相关,相关系数大小依次为单株穗数>每穗小穗数>绿叶干重>穗长>穗粒数>株高。有4个性状对单株种子产量贡献较大,其大小依次为单株穗数>每穗小穗数>绿叶干重>株高。株高的效应是负值。

The correlation, regression and path coefficients of 6 agronomic characters to seed yield per plant in turf type Lolium perenne L. indicated that the seed yield per plant was positively related with number of ears per plant (r=0.912\+ ** ), number of spikelets per ear (r=0.850\+ ** ), green leaf DW (r=0.780\+ ** ), ear lenght (r= 0.682 \+ ** ) and numbers of grains per ear (r=0.497\+*), but was negatively related with plant height (r=-0.095). The number of ears per plant, number of spikelets per ear, green leaf DW and plant height were important characters to contribute to seed yields per plant; the direct path coefficients were 0.481, 0.346, 0.207 and -0.144 respectively.