PRELIMINARY STUDIES ON BLOOD PROTEIN POLYMORPHISMS AND GENETIC RELATIONSHIPS OF THREE CATTLE BREEDS IN CHINA
Wu Bin Haemoglobin;Transferrin;Postalbumin;Slow-αglobulin and Alkaline phospliatase polymorphisms in the blood of Qinchuan;Jinnan and .Nanyang breeds of;the Chinese Central Plains were separated by pplyacrylamide gel electropho-resis under the same laboratorial conditions. The characteristic of gene distributions at these polymorphic loci was observed and the genetic stru-cture of these breeds was examined by these bioehemical marks. Meth-ods of phylogenetic analysis were used to study the relationships among the yellow cattle breeds" in Central Plains using gene frequencies at these loci. The origin and the differentiation;of them were investigated with blood group.The results state clearly that the distribution of gene and genotypic frequencies in Central Plains breeds displays the characteristic of Asian cattle breed;especially variability of HbC;TfE and TfF represents Zebu’ feature. This showed that the yellow cattle breeds of Central Plains were affected by Zebu during origin and evolution;that Nayang breed was more affected than Qinchuan and Jinnan. breeds according to Hb and Tf locus polymorphisms;which was supported by the visible appearance and ecotype. In comparision with other Cattle breeds;we found a close genetic relationship among the three breeds;and it is closer between. Qinchuan and Jinnan breeds. These results showed remarkable agreement with historical;geographical and morphological relationships.
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