苧麻主要经济性状的表型相关和通径分析

本文研究了苎麻主要经济性状的相关性和产量构成因素的相对重要性。株高，茎粗、皮厚、鲜茎重、鲜皮重、鲜皮出麻率等性状与产量呈极显著或显著正相关。在此基础上，进行通径分析。结果表明：（１）鲜茎重对产量的直接效应（通径系数）为负值，其它各性状对产量的直接效应均为正值。（２）各性状对产量的间接效应随通径线路的不同而异，（３）各性状对产量的净效应（相关系数）均为正值，但其来源不同。

Phenotypical Correlation and Path Analysis of the Main Economic Characters about Ramie

This paper studies the correlatiuity of the main economic characters ramie and the relative irrportance of output factor. The yiede is in direct proportion to the plant height,diameter of stem, thincknessof cortex,fresh weight of the stem and rate of fibres output per unite of the fresh cortex. Analysis of phenotypic path coefficient was carried out based on these data. The results we're as follows: 1. The direct effects of the characters observed to the yield show positive,but the weight of the fresh stem had negative direct influence to yield. 2. The indirct effects of the characters observed to the yield yamed with their path line. 3. The net effects of the characters observed to the yield were positive,though the influential manner were differents.