Abstract
Abstract We investigated the spatial distribution of genotypes among Korean populations of Calystegia soldanella and C, japonica. Calystegia soldanella grows only on sand and beach dunes in East Asia and reproduces both sexually and asexually, whereas C. japonica inhabits fields and roadsides in this region, and the species reproduces exclusively by underground rhizomes. Spatial autocorrelation analysis was used to investigate the spatial distribution of genotypes of 15 and 12 alleles among 13 and eight Korean populations of C. soldanella and C. japonica, respectively. For C. soldanella, within a distance of 0–123 km, all eight significant Moran's I values were positive, indicating genetic similarity among populations within the circumference. On the other hand, in C. japonica, three significant negative autocorrelation coefficients within a 0–121 km distance were detected. The observed patterns of spatial genetic structure in both species may result from differences between them in life history and ecological traits.
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