title: Independent mitochondrial origin and historical genetic differentiation in North Eastern Asian cattle.
abstract: In order to clarify the origin and genetic diversity of cattle in North Eastern Asia, this study examined mitochondrial displacement loop sequence variation and frequencies of Bos taurus and Bos indicus Y chromosome haplotypes in Japanese, Mongolian, and Korean native cattle. In mitochondrial analyses, 20% of Mongolian cattle carried B. indicus mitochondrial haplotypes, but Japanese and Korean cattle carried only B. taurus haplotypes. In contrast, all samples revealed B. taurus Y chromosome haplotypes. This may be due to the import of zebu and other cattle during the Mongol Empire era with subsequent crossing with native taurine cattle. B. taurus mtDNA sequences fall into several geographically distributed haplogroups and one of these, termed here T4, is described in each of the test samples, but has not been observed in Near Eastern, European or African cattle. This may have been locally domesticated from an East Eurasian strain of Bos primigenius.
authors.affiliation: Laboratory of Animal Breeding and Genetics, Faculty of Agriculture, Kobe University, Kobe 657-8501, Japan. mannen@kobe-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Mannen
authors.forename: M
authors.initials: M
authors.lastname: Kohno
authors.forename: Y
authors.initials: Y
authors.lastname: Nagata
authors.forename: S
authors.initials: S
authors.lastname: Tsuji
authors.forename: D G
authors.initials: DG
authors.lastname: Bradley
authors.forename: J S
authors.initials: JS
authors.lastname: Yeo
authors.forename: D
authors.initials: D
authors.lastname: Nyamsamba
authors.forename: Y
authors.initials: Y
authors.lastname: Zagdsuren
authors.forename: M
authors.initials: M
authors.lastname: Yokohama
authors.forename: K
authors.initials: K
authors.lastname: Nomura
authors.forename: T
authors.initials: T
authors.lastname: Amano
mesh_terms: D000818:Animals; D002417:Cattle / Q000145:classification / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics*; D005202:Asia, Eastern; D010802:Phylogeny; D011110:Polymorphism, Genetic
chemical_list: D004272:DNA, Mitochondrial