多花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 MAIN AGRONOMIC CHARACTERS IN LOLIUM MULTIFLORUM

作　　者：章崇玲[1] 梁祖铎[2] 

机构地区：[1]华南农业大学生物技术学院 [2]南京农业大学动物科学系

出　　处：《草业科学》1998年第1期27-29,共3页Pratacultural Science

摘　　要：对多花黑麦草的７个农艺性状与单株种子产量进行了相关和通径分析。结果表明，７个农艺性状与单株种子产量均呈显著的正相关，其相关系数的大小依次为：单株穗数＞每穗粒数＞穗长＞叶片重＞株高＞千粒重＞茎重。７个性状与单株种子产量的直接通径系数的大小依次为：单株穗数＞每穗粒数＞千粒重＞穗长＞叶片重＞株高＞茎重。单株穗数对种子产量的贡献最大，每穗粒数次之，其他性状的效应较小。提高多花黑麦草产种量，首先应着力增加单株穗数，其次增加穗粒数，适当兼顾千粒重的提高。The correlation and path-coefficient analysis of 8 agronomic characters in Lolium multiflorum were studied. The results indicated that there were significantly positive correlations between seed yield per plant and number of ears per plant, number of grains per ear, ear length, blade weight, plant height, 1 000 grain weight and stem weight. r=0.919  , 0.808  , 0.635  , 0.588  , 0.565  , 0.375 , and 0.351 , respectively. The direct path-coefficients of 7 traits above on seed yield per plant were 0.621, 0.373, 0.148, 0.117, 0.048, 0.164 and -0.223 seperately. Both the direct effect of number of ears per plant on seed yield per plant and the indirect effect of each character on number of ears per plant were the highest among 7 characters. Number of ears per plant, therefore, played a key role in improving seed yield.

关 键 词：多花黑麦草 种子产量 农艺性状 通径分析 

分 类 号：S543.602[农业科学—作物学]