Principal component analysis for major economic characteristics of Carya illinoensis and selection of superior cultivars
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摘要: 应用主成分分析法,由样本相关矩阵出发,对12个美国山核桃Carya illinoensis样本的8个主要经济性状[坚果果形系数、平均坚果质量、坚果壳厚、坚果出仁率、核仁质量、核仁脂肪、蛋白质、单位面积(m2)树冠投影面积产果量]进行分析,以性状的累积方差贡献率达到83.99%为标准,确定了3个反映美国山核桃主要经济性状的主成分及其主成分的函数式,并通过计算样本的重要主成分值,对供试样本进行比较,进而选择综合经济性状优良的样本,其结果与品种的实际表现相符。表明用主成分分析法可以对美国山核桃主要经济性状进行综合评选。图1表4参6Abstract: Based on a specimen correlation matrix,eight major economic characteristics,including fruit shape coefficient,average nut weight,shell thickness of the nut,kernel ratio,kernel weight,kernel fat content,protein content,and fruit yield per square meter of projected tree crown area,for 12 cultivars of Carya illinoensis were determined using a principal component analysis. Results according to more than 83.99% of the cumulative variance,showed that the three principal components and their functional equations were:kernel ratio,average nut weight,kernel fat content. Key principal component values of various cultivars were:kernel ratio(43.329%). Superior cultivars were determined as average nut weight with the results being similar to a practical phenotype. [Ch,1 fig. 4 tab. 6 ref.]
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https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2011.06.011
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