羊草若干数量性状的相关性及通径分析  

Correlation and Path Analysis on Quantitative Characters of Leymus chinensis

作　　者：李晓峰[1] 刘杰[1] 刘公社[1] 

机构地区：[1]中国科学院植物研究所光合作用与环境分子生理学重点实验室,北京100093

出　　处：《草地学报》2003年第1期42-47,共6页Acta Agrestia Sinica

基　　金：中国科学院知识创新重大项目 (KSCX1-0 8-0 3 );中国科学院农办重点项目 (NK十五 -A-0 5 );国家十五科技攻关重点项目(2 0 0 1BA70 7B0 2 )

摘　　要：在羊草 16个农艺性状相关分析的基础上 ,对其单株产草量和单株种子产量的构成进行通径和回归分析。结果表明 ,影响羊草单株产草量的重要因子有茎高、叶宽和叶数 ,它们不但与单株产草量的相关系数较大 ,而且直接贡献值超过了其他因子。影响羊草单株种子产量的重要因子为结实率和小花数 ,它们与单株种子产量的相关系数较大 ,其直接作用也较大。综合分析结果 ,提出选用分蘖力强的羊草种群 ,增加种植密度能够有效提高羊草的种子产量和产草量。Based on the correlative analysis of the 16 agronomic characteristics of Leymus chinensis and the path and regression analysis of its single plant forage yield and seed yield, we realize that the important elements that affect the single plant forage yield are the plant height, leaf width and the number of leaves. they outmatch all the other agronomic characteristics in directly contributing to the forage yield. The most important elements that affect the single plant seed yield are its fecundity rate and the number of florets. On the summed-up results, we suggest cultivating grassland by a Leymus chinensis species that tillers freely, and planting the grass closely so as to raise its forage yield and seed yield.

关 键 词：羊草 数量性状 相关分析 通径分析 回归方程 

分 类 号：S543.9[农业科学—作物学]