희귀 수종 눈향나무 집단의 동위효소 분석에 의한 유전변이 연구

Abstract

- Genetic variation of two Juniperus chinensisvar. sargentiipopulations in Mt. Seorak and Mt. Halla wasinvestigated by isozyme analysis at reproducible 11 loci of 7 isozyme systems(Aat-1, Aat-2, Gdh, Idh, Lap, Mdh-1, Mdh-2, Mdh-3, 6Pgd, Pgi-1, and Pgi-2), of which 7 loci were polymorphic. The levels of genetic diversity of two populationswere A=2.2, Ae=1.61, P95=54.5, Ho=0.179, He=0.287(Mt. Seorak population) and A=2.1, Ae=1.48, P95=63.6, Ho=0.270,He=0.250(Mt. Halla population), respectively. These values were similar to and/or somewhat higher than those observedin other Korean native conifers. Moderately low degree of genetic differentiation was observed between 2 analyzedpopulations (FST=0.039). Heterozygosity of the population in Mt. Seorak was significantly lower than expected, andmuch high level of inbreeding coefficient(F=0.376) was observed. Considering the limited population size anddistribution range of the population, the population seemed to be influenced by inbreeding and/or random genetic drift,Consequently, Mt. Seorak population should be considered to be a more important candidate for the conservation of J.chinensisvar. sargentii.Key words -Genetic variation, Isozyme, Inbreeding coefficient, Juniperus chinensisvar. sargentii - 77 -x