【摘要】 【目的】研究分析273份陆地棉种质资源机采性状，筛选出其中表现好的材料，为机采棉新品种选育提供理论参考。【方法】利用变异分析、相关性分析、主成分分析、聚类分析等方法，综合研究15个陆地棉机采性状。【结果】各性状变异系数差异较大，变异范围在3.93%～20.68%。单株铃数与株高、始节高、果枝数、果节数衣分、比强度呈极显著或显著正相关；始节位与果枝数、果节数、果枝夹角、单株铃数显著负相关(P<0.05);比强度与叶面积、单株铃数、绒长呈显著正相关(P<0.05);马克隆值与衣分呈极显著正相关(P<0.01),与绒长、比强度呈极显著负相关(P<0.01)。5个主成分累计贡献率为63.932%。材料分为5类，第Ⅰ类76份材料，属于大铃高衣分材料；第Ⅱ类164份材料、第Ⅲ类7份材料，都属于品质较好的材料；第Ⅳ类24份材料，整体表现最好；第Ⅴ类有2份材料，整体表现较差。【结论】273份陆地棉种质资源共分成5类，第Ⅰ类76份材料，第Ⅱ类164份材料，第Ⅲ类7份材料，第Ⅳ类24份材料，第Ⅴ类2份材料。其中第Ⅳ类共24份材料表现最好，可用于新品种选育的亲本。更多还原

【Abstract】 【Objective】 A total of 273 samples of upland cotton germplasm resources were studied and analyzed, and good performance materials were selected to provide theoretical reference for breeding new varieties of upland cotton.【Methods】 15 machine-picked characters were analyzed by variation analysis, correlation analysis, principal component analysis and cluster analysis.【Results】 The variation coefficient of each character had great difference, ranging from 3.93% to 20.68%. Boll number per plant was significantly positively correlated with plant height, initial node height, fruit branch number, fruit node fraction and specific strength; the first fruit node was significantly negatively correlated with fruit branch numbers, fruit node numbers, fruit branch angle, and bell number of single plant(P <0.05); specific intensity showed significant positive correlation with leaf area, boll number, and lint length(P<0.05); there was a significant positive correlation between Macron value and lint percent(P< 0.01), and a significant negative correlation between Macron value and lint length and specific strength(P< 0.01). The cumulative contribution rate of the five principal components was 63.932%. The materials could be divided into 5 classes. The first class had 76 materials, which belonged to big boll weight and high lint percent materials; there were 164 materials in Class Ⅱ and 7 materials in Class Ⅲ with good quality; there were 24 materials in class Ⅳ, and the overall performance was the best; Class Ⅴ had 2 materials, the overall performance was poor.【Conclusion】 The 273 germplasm resources of upland cotton were divided into 5 categories, including 76 materials from Class Ⅰ, 164 materials from Class Ⅱ, 7 materials from class Ⅲ, 24 materials from class Ⅳ and 2 materials from Class Ⅴ. Among them, 24 materials in Class Ⅳ showed the best performance and could be used as parents for breeding new varieties.更多还原