陆地棉杂种F_1代主要经济性状的通径分析

Path Coefficient Analysis of Main Economic Characteristics of Upland Cotton Hybrids F_1

以陆地棉品种间杂交的 2 8个组合为对象 ,研究分析了F1 代主要经济性状的优势表现 ,并对F1 代中的 6个主要经济性状进行了通径分析。结果表明 :杂种F1 代中皮棉产量、单株铃数、单铃重和衣分都有较强的优势表现 ;对皮棉产量直接作用较大的性状为衣分、单株铃数和单铃重 ,且它们间的相关都达到显著水平 ;同时F1 代纤维品质与皮棉产量间的负相关已经不同程度地被打破。因此在F1 代中选择时要协调好产量三要素间的关系 ,也可以通过对单铃重的选择来协调产量和品质间的矛盾。

This experiment in the investigation of the hybrids from 28 combinations between cultivars of upland cotton and in the analysis of the heterosis of 6 main economic characteristics was conducted. The results showed that the link yield, number of boll per plant, boll weight and link percent had better heterosis in hybrid F_1;link percent, number of boll per plant and boll weight had greatly direct effect on link yield, and their correlation was notable.The negative correlation between fiber quality and link yield was broke to some extent in F_1; three yield components should be paid attention to in choice of characteristics in F_1;boll weight can be used to accord the contradiction between yield and quality too.