叶用莴苣种质资源表型性状及营养品质综合评价

Comprehensive evaluation on phenotypic traits and nutritional quality of leaf lettuce germplasm resources

利用表型性状综合评价、营养成分综合评价、主成分分析和聚类分析等方法,对叶用莴苣种质资源10个农艺性状及6个营养成分进行了系统分析。结果表明:(1)叶用莴苣种质资源各性状之间变异系数存在较大差异,变异系数范围为17.94%~91.86%。13份叶用莴苣种质资源的多样性指数变化范围为1.38~1.99,叶长的多样性指数最高;(2)通过聚类分析将13份叶用莴苣种质资源分为5个类群。(3)采用主成分分析的方法,从16项基本指标中提取出产量、营养成分主成分因子,可代表叶用莴苣95.44%的信息量。综合评价结果表明:各优质种质资源综合得分范围为-2.07~3.65,综合得分排名较高的4个种质依次为普希金(3.65)>超级意大利(3.47)>绿雅(2.75)>京研意大利(1.98)。

Ten agronomic traits and six nutrient components of leaf lettuce germplasm resources were systematically analyzed by comprehensive evaluation of phenotypic traits,comprehensive evaluation of nutrient components,principal component analysis and cluster analysis.The results showed that there were significant differences in the coefficients of variation between the traits of leaf lettuce germplasm resources,and the coefficients of variation ranged from 17.94%to 91.86%.The genetic diversity indices of 13 leaf lettuce germplasm resources ranged from 1.38 to 1.99,and the diversity index of leaf length was the highest.The 13 leaf lettuces were divided into five groups by cluster analysis.The principal component analysis method was used to extract two principal component factors of yield and nutrient composition from 16 basic indicators,which could represent 95.44%of the information of leaf lettuce.The comprehensive evaluation results showed that the comprehensive scores of high-quality germplasm resources ranged from-2.07 to 3.65,and the four germplasms with higher comprehensive scores were Pushkin(3.65)>Super Italy(3.47)>Greenya(2.75)>Jingyan Italy(1.98).