基于主成分分析与聚类分析的菜心品种评价  

Evaluation of Chinese Flowering Cabbage Variety by Principal Component Analysis and Cluster Analysis

作　　者：史卫东 罗海玲 康红卫 农贵雄 韦爱培 SHI Wei-dong;LUO Hai-ling;KANG Hong-wei(Institute of Vegetable,Guangxi Academy of Agricultural Sciences,Nanning,Guangxi 530007)

机构地区：[1]广西壮族自治区农业科学院蔬菜研究所,广西南宁530007 [2]田阳县农业农村局,广西百色533600

出　　处：《安徽农业科学》2020年第24期46-49,52,共5页Journal of Anhui Agricultural Sciences

基　　金：广西科技重大专项(桂科AA17204041)。

摘　　要：为了评价29份菜心品种的表型多样性,对株高、开展度、叶片数、叶重、侧分枝数、主薹茎长、主薹直径、主薹重量、单株重和生物产量等10个表型性状进行了变异分析、回归分析、主成分分析和聚类分析。结果表明,10个性状的平均变异系数为68.02%,从大到小依次为叶重、单株重,主薹重量、开展度、生物产量、侧分枝数、叶片数、主薹茎长、株高和主薹直径。开展度、叶重、主薹直径、侧分枝数和单株重与生物产量相关性未达到显著水平,其余性状间均达到极显著相关水平。经主成分分析提取第1个主成分,累计方差贡献率为80.997%,特征向量包括全部指标。依据第1个主成分贡献率的大小综合评判,选择植株高大、单株质量大、主薹直径大和质量大、叶片数较多且质量大、侧分枝数较多的菜心作为优异品种。聚类分析分为3个类群,第1类除了生物产量最高外,其余9个指标较低;第2类除了生物产量最低外,其余9个指标较高;第3类生物产量高于第2类,低于第1类,其余9个指标最低。该研究可为菜心品种评价及应用提供基本信息。In order to evaluate the phenotypic diversity of 29 Chinese flowering cabbages varieties,the variation analysis,stepwise regression analysis,principal component analysis and cluster analysis were used to analyze 10 phenotypic traits.The results showed the coefficient of variation of 10 traits was 68.02%,with the order from high to low being leaf weight,plant weight,main stalk weight,range,biomass,branch,leaf number,main stalk height,height and main stalk diameter.No significant correlations existed between range,leaf weight,main stalk diameter,branch,plant weight and biomass.There were significant correlations among other traits.The results of principal component analysis showed that 10 characteristic indexes could be classified into the first principal component which cumulative contribution rate was 80.997%.According to the comprehensive evaluation of the contribution rate of the first principal component,the cabbage with higher and larger,more plant weight,more main stalk diameter and weight,more leaf number and weight and more branches was selected as excellent variety.Morphologically 29 cabbages were clustered into three groups.The first group had maximum biomass and lower value of other nine characteristics.The second group had minimum biomass and higher value of other nine characteristics.The third group had middle biomass and the lowest value of other nine characteristics.These results were useful to provide the basic information for research and application of Chinese flowering cabbages variety.

关 键 词：菜心品种 主成分 聚类分析 

分 类 号：S634.5[农业科学—蔬菜学]