Genetic variation of Oplopanax elatus (Nakai) Nakai (Araliaceae)

摘要

Using allozyme analysis, genetic and genotypic variation of rare relict species, a member of one of ancient angiosperm families, Araliaceae, the clonal plant Oplopanax elatus (Nakai) Nakai, was evaluated. Electrophoretic separation of the enzymes is described, and genetic interpretation of the enzymes variation patterns is presented. The values of genetic variation indices obtained were low (P = 25%; A = 1. 45: H_o = 0. 131; H_e = 0. 113) and comparable with the data reported for the rare plant species and the representatives of the family Araliaceae. The main factors responsible for the polymorphism level observed might be the evolutionary history of the species and gene drift. The level of genotypic diversity (G/N = 0. 76; D = 0. 97) was substantially higher, compared to the values reported for species with vegetative reproduction (D = 0. 62). These results suggest certain contribution of the propagation by seeds in the formation of the species of interest.