Abstract:

This study analyzed the diversity of 8 qualitative and 18 quantitative traits of the fruit of 114 wild jujube（Ziziphus jujuba var. spinosa Hu.）resources in Shanxi Province by using genetic variation analysis，correlation analysis，cluster analysis and principal component analysis. The results showed that the genetic diversity indices of 8 qualitative traits ranged from 0.547 to 1.725，among which the indices of fruit shape and stone tip were both greater than 1. The coefficient of variation of 18 quantitative traits ranged from 7.27%（edible rate）to 80.50%（double-kernel rate）. Among them，fruit weight and titratable acid content also were relatively high coefficients of variation（> 60%）. The genetic diversity indices ranged from 1.811（stone-shell thickness）to 2.058（soluble solids content）. Correlation analysis showed that fruit weight was extremely significantly positively correlated with edible rate and stone weight，and significantly negatively correlated with kernel fruit ratio，kernel rate，titratable acid content. Cluster analysis divided the wild jujube germplasms into two categories：categoryⅠgermplasms were characterized by small fruit weight，low edible rate and high kernel rate，which were mainly used for kernel purposes；categoryⅡgermplasms had large fruit weight，high edible rate and low kernel rate，and were mainly suitable for fresh consumption.

Key words: wild jujube, germplasm, fruit, diversity