Clonal and spatial genetic structure in a population of the endangered herb Lycoris sanguinea var. koreana (Amaryllidaceae)

For plant species reproducing both sexually and vegetatively, the spatial d istribution of clones generally affects the levels of biparental inbreeding and apparent selfing rate, produced via mating by proximity through limite d pollen dispersal. We used allozyme loci,join-count statistics, and Moran' s spatial autocorrelation statistics to separate the spatial genetic struct ure caused by clonal reproduction from that maintained in sexually reproduc ing individuals in a population of Lycoris sanguinea var. koreana. Join-cou nt statistics showed that there were statistically significant clustering o f clonal genotypes at short distances 2 m. Both the entire population and t he set of sexually reproduced individuals exhibited significant spatial aut ocorrelation on a scale of 2-6 m in an isolation-by- distance manner due to the limited seed and pollen dispersal, which is consistent with a neighbor hood size of about 25.