title: Haplogroup Classification of Korean Cattle Breeds Based on Sequence Variations of mtDNA Control Region.
abstract: Many studies have reported the frequency and distribution of haplogroups among various cattle breeds for verification of their origins and genetic diversity. In this study, 318 complete sequences of the mtDNA control region from four Korean cattle breeds were used for haplogroup classification. 71 polymorphic sites and 66 haplotypes were found in these sequences. Consistent with the genetic patterns in previous reports, four haplogroups (T1, T2, T3, and T4) were identified in Korean cattle breeds. In addition, T1a, T3a, and T3b sub-haplogroups were classified. In the phylogenetic tree, each haplogroup formed an independent cluster. The frequencies of T3, T4, T1 (containing T1a), and T2 were 66%, 16%, 10%, and 8%, respectively. Especially, the T1 haplogroup contained only one haplotype and a sample. All four haplogroups were found in Chikso, Jeju black and Hanwoo. However, only the T3 and T4 haplogroups appeared in Heugu, and most Chikso populations showed a partial of four haplogroups. These results will be useful for stable conservation and efficient management of Korean cattle breeds.
authors.affiliation: Animal Genetic Resources Research Center, NIAS, RDA, Namwon 55717, Korea.
authors.forename: Jae-Hwan
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Animal Genetic Resources Research Center, NIAS, RDA, Namwon 55717, Korea.
authors.forename: Seong-Su
authors.initials: SS
authors.lastname: Lee
authors.affiliation: Animal Genetic Resources Research Center, NIAS, RDA, Namwon 55717, Korea.
authors.forename: Seung Chang
authors.initials: SC
authors.lastname: Kim
authors.affiliation: Animal Genetic Resources Research Center, NIAS, RDA, Namwon 55717, Korea.
authors.forename: Seong-Bok
authors.initials: SB
authors.lastname: Choi
authors.affiliation: Gyeonggi Livestock and Veterinary Service, Suwon 16381, Korea.
authors.forename: Su-Hyun
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Gangwon Provincial Livestock Research Center, Hoengseong 25266, Korea.
authors.forename: Chang Woo
authors.initials: CW
authors.lastname: Lee
authors.affiliation: Chungbuk Institute of Livestock and Veterinary Research, Cheongwon 28153, Korea.
authors.forename: Kyoung-Sub
authors.initials: KS
authors.lastname: Jung
authors.affiliation: Jeonbuk Institute of Livestock and Veterinary Research, Gimje 54324, Korea.
authors.forename: Eun Sung
authors.initials: ES
authors.lastname: Kim
authors.affiliation: Jeonnam Agricultural Research and Extension Services, Gangjin 59213, Korea.
authors.forename: Young-Sun
authors.initials: YS
authors.lastname: Choi
authors.affiliation: Chungnam Institute of Livestock Experiment Research, Cheongyang 33350, Korea.
authors.forename: Sung-Bok
authors.initials: SB
authors.lastname: Kim
authors.affiliation: Gyeongbuk Livestock Research Institute, Yeongju 36052, Korea.
authors.forename: Woo Hyun
authors.initials: WH
authors.lastname: Kim
authors.affiliation: Animal Genetic Resources Research Center, NIAS, RDA, Namwon 55717, Korea.
authors.forename: Chang-Yeon
authors.initials: CY
authors.lastname: Cho
keywords: Control Region; Haplogroup; Korean Cattle Breed; Phylogenetic Tree; mtDNA