[논문]Genetic Diversity and Spatial Structure of Symplocarpus renifolius on Mt. Cheonma, Korea

Jeong, Ji-Hee; Park, Yu-Jin; Kim, Zin-Suh

Genetic Diversity and Spatial Structure of Symplocarpus renifolius on Mt. Cheonma, Korea 원문보기

韓國資源植物學會誌 = Korean journal of plant resources, v.20 no.6, 2007년, pp.530 - 539

Jeong, Ji-Hee (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) , Park, Yu-Jin (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) , Kim, Zin-Suh (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University)

Abstract ▼ AI-Helper

Genetic variation and structure of 9 subpopulations of Symplocarpus renifolius Schott ex Tzvelev on Mt. Cheonma, in Korea, were determined via starch-gel electrophoresis. The genetic diversity at 10 loci for 8 isozymes ($P_{99}=66%,\;A=2.26,\;H_o=0.212,\;H_e=0.230$) was found to be considerably higher than that seen in other long-lived perennial plants. On the whole, the genotype frequencies were in accordance with Hardy-Weinberg expectations. Approximately 5%($\theta=0.049$) of the total variability was among subpopulations. The high levels of observed genetic diversity in S. renifolius were attributed to a universal outcrossing system and other specific factors like differences in age classes and widely scattered individuals around the main distribution. Heterozygosity was highest at a mid-range of elevation($450m{\sim}600m$). The lowest heterozygosity at lower elevation was attributed to the possible origin of seeds transported by water from upstream regions during the monsoon season. Spatial structure in a subpopulation evidenced a strong autocorrelation between closer individuals within $3{\sim}4m$ of distance. This was assumed to be attributable to the restricted seed dispersal characteristics of S. renifolius. In accordance with the findings generated in this study, some implications regarding the conservation of S. renifolius at the Mt. Cheonma were also presented.

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제안 방법

The autocorrelation coefficient, Moran's I, was calculated for all individuals within a 1m distance of one another, in order to generate a correlogram. For each of the spatial distance classes, the observed values were compared with the distributions obtained after 1, 500 permutations, after which a 95% confidence interval for the parameters was constructed, as the interval from the lower and upper limit ordered permutation estimates.
In this study, we used isozyme markers to examine the genetic diversity of nine sub-populations of S. renifolius gathered from the Mt. Cheonma area. The genetic diversity data of the yellow spathe variants was compared with those of other subpopulations, in order to determine whether a significant difference exists between the two groups.

대상 데이터

The mountain Cheonma study site is located in Gyeonggi province, in central Korea (N 37° 40' 44" E 127° 16' 3”). The vegetation of Mt.

데이터처리

The aggregation index (R) of Clark and Evans (1954) was calculated as an indicator of the spatial distribution between individuals. The autocorrelation coefficient, Moran's I, was calculated for all individuals within a 1m distance of one another, in order to generate a correlogram. For each of the spatial distance classes, the observed values were compared with the distributions obtained after 1, 500 permutations, after which a 95% confidence interval for the parameters was constructed, as the interval from the lower and upper limit ordered permutation estimates.

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