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Allozyme variability within and among populations in the Asian liverwort Asterella liukiuensis

Abstract Genetic diversity of the liverwort Asterella liukiuensis (Horik.) Horik. was investigated using horizontal starch-gel electrophoresis to measure variability at 17 enzyme loci from 12 natural populations in the Ryukyu archipelago. Levels of genetic diversity within both species and populations were very low (Hes = 0.056 ± 0.016, Hs = 0.064 ± 0.017, respectively). One-way analysis of variance (ANOVA) of eight morphological characters detected significant differences among islands and populations. Populations within each island of the Ryukyu archipelago did not form a genetic group, however genetic differentiation among populations was high (Gst = 0.681 ± 0.079). This species was genetically and morphologically diverse over its range from the Ryukyu archipelago to Taiwan.