体胚诱变结缕草属突变体形态特征及生长特性评价

对结缕草属3个种的119份体胚诱变突变体的13个外部形态特征及生长特性进行了相关分析。结果表明：突变体的所有13个性状的变异均较大，其中匍匐枝总长度、单株覆盖面积、叶毛及密度的变异系数均高于1。主成分分析结果表明，单株覆盖面积、匍匐枝总长度、密度以及直立枝节间长4个性状对结缕草属突变体的遗传多样性研究具有重要意义。在聚类分析基础上，将119份突变体种源划分为4组，分别为细叶多毛型突变体、粗径早绿型突变体、短叶少毛型突变体、宽叶晚绿型突变体。

Evaluation of morphological and growth characteristics of somatic embryo mutants of Zoysia

Thirteen morphological and growth characteristics of somatic embryo mutants of Zoysia including 3 species and 119 mutants were analyzed. Results showed that the variation of all the 13 traits were large， among which the variation coefficient of total length of creeping branch， covering area per plant， lamellar hair and density were higher than 1. The results of principal component analysis showed that single cover area， total length of creeping branch， density and erect internode length were meaningful for the study on genetic diversity of Zoysia mutants. Based on the clustering analysis， 119 Zoysia mutants were divided into four groups， including narrow leaf and hairy type mutants， large diameter and early green mutants， short leaf and little hair type mutants， and wide leaf and lately green mutants.