육우의 유전적 표식로서 생화학적 유전형질의 다형현상에 관한 연구 2 . 품종간 유전적 변이성 및 유연관계 (類緣關係) = Studies on Biochemical Polymorphisms as Genetic Markers in Beef Cattle 2 . Genetic variability and relationship between breeds

다국어 초록 (Multilingual Abstract)

By using gene frequency data on the six biochemical polymorphic loci(Hb, Al, Tf, Am, CA and Cp) of blood protein and enzymes of three imported beef cattle breeds(Angus, Hereford and Charolais) raised in Korea, the genetic variability within breeds was quantified by the expected average heterozygosity, effective number of alleles and gene homogeneity index. The phylogenetic relationships among three breeds were estimated by the genetic distance. In addition, the efficacy of the genetic marker in solving problems of questionable parentage and in identifying individuals was investigated. From comparision of genetic variability between breeds, it was observed that Charolais showed somewhat higher than the other two breeds. The genetic variability of Angus was similar to that of Hereford. In comparision of genetic identity and standard genetic distance among three breeds, the most close relationship was observed between Angus and Hereford and the lowest genetic similarity was recognized between Angus and Charolais. The combined probability of excluding wrong parentage by the six blood marker loci in the three breeds was estimated to be 61-68%. The probability of distinguishing individuals over all the 6 loci was estimated to be 97.6-98.4%. Accordingly, it was proved that parentage control could be carried out practically by using the six polymorphic loci and these loci were considerably useful as genetic markers for application to the pedigree registry of beef cattle breeds.