马铃薯产量构成因素的通径分析

为了明确各因素对单株产量构成的直接与间接效应及相对重要性,本文在遗传、表现、环境相关分析基础上,进行通径分析。其结果表明:株高、穴茎数、主茎粗和单株块茎鲜重均为极显著正相关;复叶数、分枝数和单株产量虽为正相关,但均不显著。株高、分枝数两因素对单株产量的直接效应最大,其次是主茎粗和穴茎数;复叶数对单株产量的直接效应为负值。

PATH COEFFICIENT ANALYSIS OF YIELD COMPONENTS IN POTATO

In order to determine the direct and indirect influence of potato yield components on the yield per hill and their relative importance,path coeffi- cient analysis was carried out on the basis of correlation analysis of genotype, phenotype and environment.The results were as follows: The correlation of yield per hill to plant height,stem numbers per hill and diameter of main stem was positive at 1% significance;although correlation of yield per hill to the numbers of compound leaves and branches was positive,but it was not significant.The direct influence of plant height and branch number on yield per hill was most important,and diameter of main stem and stem number per hill came second,but the direct influence of compound leaf number on yield per hill was negative.