Phylogenetic relationship between the yellow cattle in Qinghai province, China, and Japanese black cattle based on mitochondrial DNA D-loop sequence polymorphism
2004
Shi, J. (Yamaguchi Univ. (Japan). Faculty of Agriculture) | Qiao, H. | Hosoi, E. | Ozawa, S.
Studies on the genetic diversity of Qinghai Yellow cattle herds maintained on the East Tibetan Plateau were carried out and their diversity was compared to Japanese cattle. Total DNA was extracted from each hair sample collected from 27 Qinghai Yellow cattle, and its nucleotide sequence of the D-loop region of mitochondrial DNA was determined. Obtained results showed that lineages of the Qinghai Yellow cattle were divided into three major groups such as Bos grunninens (Yak), B. indicus and B. taurus. The number of animals classified into each group was 4, 2 and 21, respectively. Among 21 animals that belonged to the B. Taurus group, 17 haplotypes were found. It was revealed, therefore, that the Qinghai Yellow cattle had extremely high genetic diversity. The dendrogram of the 17 haplotypes of the B. Taurus Qinghai Yellow cattle showed that they could be divided into 3 clusters : East Asian, African and European group. Japanese Black cattle are considered to have common ancestors with Qinghai Yellow cattle, except for African type, which was not found from the Japanese Black cattle in the present study.
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