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.
出处
《草业科学》
CAS
CSCD
北大核心
1998年第1期27-29,共3页
Pratacultural Science
关键词
多花黑麦草
种子产量
农艺性状
通径分析
Lolium multiflorum, seed yield, agronomic characters, path-coefficient analysis
