陆地棉主要农艺性状的变异性、聚类和相关性分析

目的]为新疆陆地棉品种选育、选择和高产栽培提供理论和参考依据.方法]对29个陆地棉品种(系)的主要性状进行变异性、聚类和相关性分析.结果]29个陆地棉品种(系)聚为2大类4亚类,这些亚类之间的表型特征差异较明显；其始节位、果枝数、667 m2株数、株高的变异系数较大,产量及其构成次之、纤维品质构成最小；皮棉产量与单株铃数、单铃重、667 m2株数、衣分、始节位、果枝数、绒长呈正相关,与株高、籽指、衣指、比强度、整齐度、伸长率和马克隆值呈负相关,其中衣分、667 m2株数与皮棉产量达到了显著水平.结论]衣分和667 m2株数是影响皮棉产量的主要因素,其次是单株铃数、单铃重,因此南疆种植陆地棉应选择高衣分品种、适当增大栽培密度是提高产量的重要途径之一.

Analysis of Correlation,Cluster and Variation on the Main Agronomic Characters of the Upland Cotton Cultivars or Lines

Objective]The present research was carried out to effectively provide the useful information and academic base for choosing and breeding high yield cotton variety in Xinjiang.Method]The correlation,cluster and variation of the main agronomic characters were analyzed in 29 cotton cultivars or lines by using multivariate statistics.Result]All the 29 cotton cultivars or lines were clustered into 2 major groups or 4 small categories according to the main characters.The phenotypic characteristics of those sub...