摘要
运用主成分分析法,由样本相关矩阵出发,对9个核桃优良单株的8个主要经性状(三径平均、坚果重、壳厚、种仁重、出仁率、粗脂肪、蛋白质、单位面积核桃树冠投影产仁量)进行分析,以性状的累计方差贡献率达到82.751%为标准,确定了两个反映攀枝花市核桃主要经济性状的主成分及其函数式,并通过计算样本的重要主成分值和对供试样本进行坚果性状比较,最终选择出综合经济性状优良的样本。
Using the method of principal component analysis, starting from the sample correlation matrix, analysis was made of 8 main characters （by three-diameter average size, shell thickness, nut weight, kernel weight, kernel rate, crude fat, protein, per unit area yield of walnut kernel weight crown projection） of fine individuals of 9 walnut varieties. Taking the cumulative variance contribution rate of the characters reaching 82. 751% as the standard, the main composition and function of two main economic traits were determined, able to display the main characters of walnuts in Panzhihua city. By the nut character comparison of samples, the excellent samples with comprehensive economic characters were finally selected. Key words： Panzhihua city, Walnut, Fine individual, Economic character, Principal component analysis, High-quality seed
出处
《四川林业科技》
2015年第4期33-36,共4页
Journal of Sichuan Forestry Science and Technology
基金
攀枝花市科技计划项目"攀枝花市核桃产业发展关键技术研究"(2009CY-N-1(3))
关键词
攀枝花市
核桃
优良单株
经济性状
主成分分析
良种
Panzhihua city, Walnut, Fine individual, Economic character, Principal component analysis,High-quality seed
