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在高温干旱条件下,通过大田试验测定20个陆地棉花品种的主要产量性状、纤维品质性状及农艺性状,并进行综合评价。应用主成分分析法对20个品种的皮棉产量、生育期、株高、始果节、果枝数、有效铃、铃重、衣分、纤维长度、整齐度、麦克隆值、伸长率和断裂比强度进行分析。确定了主要性状的5个主成分及其主成分的函数方程和主成分综合函数方程,主成分的方差累积贡献率达到84.087%。通过计算主成分值和综合主成分值,对供试的20个品种进行了比较,进而选择了湘YC3F1、晋棉38、豫宝8号3个综合性状优良的品种,其结果与实际相一致。
Under high temperature and drought conditions, the main yield traits, fiber quality traits and agronomic traits of 20 cotton cultivars were determined by field experiments and evaluated comprehensively. Principal component analysis (PCA) was used to analyze the effects of lint yield, growth period, plant height, fruit and fruit section, fruiting branch number, effective boll, boll weight, lint percentage, fiber length, uniformity, micronaire, elongation and breaking on 20 varieties Specific strength analysis. The main function of the five main components and principal components of the functional equation and the principal component of the integrated function equation, the main component of the cumulative contribution rate of variance reached 84.087%. By comparing the principal component values and the integrated principal component values, the 20 cultivars tested were compared, and three varieties with good comprehensive characteristics of Hunan YC3F1, Jinmian 38 and Henan Yubao 8 were selected and the results were consistent with the actual ones .