Phenotypic Diversity Analysis of Rhodomyrtus tomentosa Natural Populations Based on Leaf and Fruit Traits
To comprehensively and deeply study the phenotypic diversity of natural populations of Rhodomyrtus tomentosa,the phenotypic traits of fruits and leaves of 36 populations in the natural distribution ar-ea of R.tomentosa were analyzed.Fifteen phenotypic indicators of R.tomentosa were selected to calculate the mean values,standard deviations,coefficients of variation,phenotypic differentiation coefficients,and Shan-non-Wiener diversity indices,and the cluster analysis of phenotypic traits was conducted.The results showed that the average coefficient of variation for each trait ranged from 6.87%to 40.83%.Notably,the placenta width,leaf length,leaf area,and leaf perimeter exhibited higher average coefficients of variation,all excee-ding 15%.The phenotypic trait variation coefficients for the populations in Wenshan,Guilin,and Leizhou were relatively high,all exceeding 17%.The average Shannon-Wiener diversity index for each trait ranged from 0.68 to 2.39,with the average Shannon-Wiener diversity index for the number of seeds per whorl being significantly lower than that of other traits.The average Shannon-Wiener diversity indices for the phenotypic traits of the populations ranged from 1.19 to 2.02,with the populations in Laibin,Huizhou,and Shanwei ex-hibiting higher phenotypic trait diversity indices.The variance component among populations accounted for 22.91%,while the variance component within populations accounted for 38.13%.The phenotypic differentia-tion coefficients ranged from 0.14 to 0.83.Based on the phenotypic traits,the populations of R.tomentosa were classified into four groups.Notably,R.tomentosa populations from Huizhou and Shanwei are identified as superior germplasm sources for the selection and breeding of large-fruit varieties,while the populations from Changjiang,Wuzhishan and Wenzhou are recognized as superior germplasm sources for the selection and breed-ing of high brix varieties.
NETL
NSTL
万方数据
