PJB-2020-276
Phenotypic diversity and genetic variability of Acer ginnala (Aceraceae) assessed by morphological traits and cp-SSR markers
Juan He
Abstract
Acer ginnala (Aceraceae) is an economically and ecologically species in the north region of China. On account of the environmental degradation and artificial destruction, the conservation measurement was imminently required to exploit for A. ginnala. In this study, the phenotypic diversity and genetic variability of twenty-six A. ginnala populations were examined using the methodology of morphological traits and the chloroplast microsatellites markers (cp-SSRs). These results demonstrated that high levels of morphological diversity and genetic variability were significantly occurred among A. ginnala populations. The morphological characteristics constructed that the Shannon-Wiener index (HSW) of twenty-six populations was presented from 1.94 to 2.27, and the mean value was confirmed with 2.006; the coefficient of variation was 23.07%; the phenotypic differentiation coefficients (VST) exhibited 29.95% among populations while exhibited 70.05% within populations. Based on the methodology of chloroplast microsatellites (cpSSRs) markers, the percentage of polymorphic bands (PPB), Nei's gene diversity (He) and Shannon's information index (I) were 83.60%, 0.24 and 0.39, respectively; AMOVA analyses explored that genetic variation mainly existed within populations (62.00%) while less genetic differentiation was occurred among populations (Gst = 0.26). Both morphological and molecular experiments were clustered into two clustering with twenty-six nature populations, which were in correspondence with the results of PCoA and STRUCTURE analyses. It indicated that integrated the phenotypic diversity and genetic variability together could provide an appropriate and potential conservation strategy for A. ginnala populations.
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