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Fine-scale genetic differentiation of a temperate herb: relevance of local environments and demographic change
- Sato, Yasuhiro, Kudoh, Hiroshi
- AoB Plants 2014 v.6 no.0 pp. plu070
- Arabidopsis, genetic variation, microhabitats, population, population size
- To examine determinants of geographical patterns in population differentiation, we quantified genetic variation of a temperate herb, Arabidopsis halleri subsp. gemmifera, across the Japanese mainland. We found significant evidence for isolation-by-distance but not for isolation-by-environments. However, at least within the central area, the magnitude of genetic differentiation tended to increase with microhabitat dissimilarity in light conditions and water availability. Furthermore, most populations have been estimated to experience a recent decline in the effective population size. These findings highlight a potential influence of the microhabitat conditions and demographic processes on the local-scale genetic differentiation among natural plant populations.