关键词: 柿, 种质, 果实, 表型, 数量性状

Abstract:

In order to evaluate fruit morphological diversity of persimmon（Diospyros kaki Thunb.）,nine fruit quantitative traits,including longitudinal diameter,transverse diameter,lateral diameter,fruit shape index,stalk length,stalk diameter,pedicle length,pedicle width and fresh weight per fruit of 260 persimmon germplasm resources were determined. Subsequently,genetic diversity,correlation,cluster and principal component analysis were conducted on these traits. The results demonstrated high genetic diversities of the morphological traits. Variation coefficients of the nine morphological traits ranged from 16.98%（fruit shape index）to 50.57%（fresh weight per fruit）. Principal component analysis exhibited that the first three principal components with a cumulative contribution rate of 78.85% could represent all the nine morphological traits well. Based on the first and third principal components,the samples in this study were divided into five groups. Group Ⅰ and Ⅳ were suitable for breeding oblate spherical varieties;group Ⅱ and Ⅲ were suitable for breeding spherical varieties;group Ⅴ was suitable for breeding long spherical varieties;group Ⅳ was suitable for breeding large fruit varieties,and group Ⅱ was suitable for breeding small fruit size varieties.

Key words: persimmon, germplasm, fruit, morphological, quantitative trait