Allele Frequencies of COL2A1 Locus in Koreans detected by Polymerase Chain Reaction |
Myung Jae Kwak , Hyeon Koon Myeong , Hee Suk Lee , Juck Joon Hwang |
Department of Legal Medicine, College of Medicine, Korea University, Seoul, Korea |
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Abstract |
With the human genomic DNAs obtained from 128 unrelated Korean, the VNTR re- gion 3’ to the collagen type II gene(COL2A1) was amplified in vitro by the polymerase chain reaction(PCR), and separated by 3% agarose(2% Nusieve and 1% Seakem) and 4% polyacrylamide gel and analyzed to get the population genetic data for COL2A1 VNTR allele such as allele and genotype frequencies, and hetrozygosity were calculated based on the amplified fragments length polymorphism(AMP FLP) . 1. In 128 unrelated Korean, 4 allelic variants(K2, K3, K4, and K5) at COL2A1 VNTR locus are observed, but K1 allele which was also observed in other study was not. 2. The observed allele frequencies for K4, K5, K3 and K2 are 0.519, 0.383, 0.094 and 0. 008, respectively. 3. Of 10 possible genotypes, only 4 heterozygous genotypes (K5/K4, K5/K3, K4/ K3, K4/ K2) and 2 homozygous genotypes (K5/K5, K4/K4) are observed. However, the observed numbers of homozygous and heterozygous genotypes(46 and 82, respectively) are not significatly different from their expectations, 53.3 and 74.7. 4. The observed genotype frequencies are ordered as K5/K4(0.445), K4/K4(0,242), K5/ K5(0.117), K5/K3(0.086) and K4/K2(0.086), which are in accordance with the Hardy- weinberg prediction based on the observed allele frequencies. 5. The overall heterozygosity at this locus is 0.563, while its expectation based on the allele frequencies is 0.584. |
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