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KMID : 0368420000430030136
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Journal of Plant Biology
2000 Volume.43 No. 3 p.136 ~ p.142
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Genetic Variation and Population Structure of Carex breviculmis(Cyperaceae) in Korea
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Huh, Man Kyu
Lee, Hak Young/Mishra, Shambhu Nath/Huh, Hong Wook
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Abstract
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We determined the genetic diversity and population structures of Carex breviculmis (Cyperaceae) populations in Korea, using genetic variations at 23 allozyme loci. C. breviculmis is a long-lived herbaceous species that is widely distributed in eastern Asia. A high level of genetic variation was found in 15 populations. Twelve enzymes revealed 23 loci, of which 11 were polymorphic (47.8%). Genetic diversity at the speciesand population levels were 0.174 and 0.146, respectively. Total genetic diversity (H_γ=0.363) and within-population genetic diversity (H_s=0.346) were high, whereas the extent of the population divergence was relatively low (C_ST=0.063). Deviation from random mating (F_lS) within the 15 populations was 0.206. An indirect estimate of the number of migrants per generation (Nm=3.69) indicated that gene flow was extensive among Korean populations of this species. Analysis of fixation indices revealed a substantial heterozygote deficiency in some populations and at some loci. Genetic identity between populations was high, exceeding 0.956.
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KEYWORD
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