青萝卜种质资源主要农艺性状的表型评价

主要农艺性状的表型评价是青萝卜育种的重要依据。对48 份青萝卜种质资源的33 个主要农艺性状进行变异分析、相关性分析、主成分分析和聚类分析，结果表明：9 个数量性状均有不同程度的变异，单株质量变异系数最大，为32.46%，叶宽变异系数最小，为14.67%；以肉质根为主的典型农艺性状间存在复杂的相关性，相关性极显著的有29 对，相关性显著的有8 对；从33 个农艺性状提取出9 个主成分，累计贡献率为78.937%，基本反映了青萝卜地上部和地下部重要农艺性状信息；在平方欧式距离系数为8.5 时，可将48 份供试青萝卜种质资源分为3 个组群，第Ⅰ组群包括33 份材料，主要特征是株高、开展度、叶长、叶宽和叶片数在3 组中最小，第Ⅱ组群包括14 份材料，主要特征为株型、叶片大小中等，第Ⅲ组群只有1份材料，其株高、开展度、单株质量和单根质量在3 组中最大。

Phenotypic Evaluation on Main Agronomic Traits of Germplasm Resources of Green Radish

Phenotypic evaluation of major agronomic traits is an important accordance for green radish breeding．This paper carried out variation analysis，correlation analysis，principal component analysis and clustering analysis on 33 major agronomic traits of 48 germplasm resources of green radish．The results showed that there were variation of different degrees in 9 quantitative traits．The variation coefficient of single plant weight was maximum-32.46%，and that of leaf width was minimum-14.67%．There existed complicated correlation among typical agronomic traits taking fleshy root as main body．There were 29 pairs with extreme significant correlation and 8 pairs with significant correlation．There were 9 principal components extracted from 33 agronomic traits，and their cumulative contribution rate was 78.937%，basically reflecting the agronomic traits information of the upper and under ground parts of green radish．When the squared Euclidean distance coefficient was 8.5，the 48 germplasm resources of green radish could be divided into 3 groups．The first group included 33 materials with major characteristics of plant height，stretching degree，leaf length，leaf width and leaf blade number．Those values were the least among the 3 groups．The second group included 14 materials with major characteristics of plant type，medium size of leaf blades，etc．The third group included only 1 material．Its plant height，stretching degree，single plant weight and single root weight was the largest among these 3 groups．