Mating system and conservation genetics of Kirengeshoma palmata Yatabe in Korea = 나도승마의 수분기작과 보전유전학적 연구

다국어 초록 (Multilingual Abstract)

The mating system, patterns of allozyme variation of Kiregeshoma palmata were investigated to better understand its population biology and to comment on reserve designs and management proposals relevqant to this species. This species, which holds relatively high genetic variation at the 11 allozyme loci surveyedm is geographically restricted with five occurrences in Mt. Baegun, southern part of Korea. Measures of genetic variation in Baegun, southern part of Korea. Measures of genetic variation in this species [e.g., alleles per locus (A)=1.47, proportion of polymorphic loci (P)=0.37, and expected heterozygosity (He)=0.100] were higher than values reported for species with similar ecological and life history traits. Mating system studies on one site showed consistently high levels of the outcrossing rate. The mean germination rate of seeds was 11% and not all seedling (56%) survived up to six months. Results suggested that low germination and survival rate are responsible for current patterns of poor regeneration of this species. Basal rhizome is the primary means of means of reproduction and several plants frequently include groups of visibly connected individuals in a clustered distribution that suggests cloning. It was found that no significant substructure among plots within sites, and fixation indices within sites were generally small, suggesting that either little inbreeding occurs or few inbred progenies survive. The dcurrent population genetic structure in four sites probably the result of local extinction of intervening populations or a reflection of its recent origin from the close sites. Two sites on the ridge of this mountain should be given conservation priority on genetic grounds.