title: Determination of Genetic Diversity among Korean Hanwoo Cattle Based on Physical Characteristics.
abstract: This study was conducted to establish genetic criteria for phenotypic characteristics of Hanwoo cattle based on allele frequencies and genetic variance analysis using microsatellite markers. Analysis of the genetic diversity among 399 Hanwoo cattle classified according to nose pigmentation and coat color was carried out using 22 microsatellite markers. The results revealed that the INRA035 locus was associated with the highest Fis (0.536). Given that the Fis value for the Hanwoo INRA035 population ranged from 0.533 (white) to 1.000 (white spotted), this finding was consistent with the loci being fixed in Hanwoo cattle. Expected heterozygosities of the Hanwoo groups classified by coat colors and degree of nose pigmentation ranged from 0.689±0.023 (Holstein) to 0.743±0.021 (nose pigmentation level of d). Normal Hanwoo and animals with a mixed white coat showed the closest relationship because the lowest DA value was observed between these groups. However, a pair-wise differentiation test of Fst showed no significant difference among the Hanwoo groups classified by coat color and degree of nose pigmentation (p<0.01). Moreover, results of the neighbor-joining tree based on a DA genetic distance matrix within 399 Hanwoo individuals and principal component analyses confirmed that different groups of cattle with mixed coat color and nose pigmentation formed other specific groups representing Hanwoo genetic and phenotypic characteristics. The results of this study support a relaxation of policies regulating bull selection or animal registration in an effort to minimize financial loss, and could provide basic information that can be used for establishing criteria to classify Hanwoo phenotypes.
authors: Department of Animal Science, Kyungpook National University, 386 Gajang-dong Sangju, Kyungpook, 742-711, Korea .
authors: T J
authors: TJ
authors: Choi
authors: Department of Animal Science, Kyungpook National University, 386 Gajang-dong Sangju, Kyungpook, 742-711, Korea .
authors: S S
authors: SS
authors: Lee
authors: Department of Animal Science, Kyungpook National University, 386 Gajang-dong Sangju, Kyungpook, 742-711, Korea .
authors: D H
authors: DH
authors: Yoon
authors: Department of Animal Science and Technology, Sunchon National University, Sunchon, 540-742, Korea .
authors: H S
authors: HS
authors: Kang
authors: Department of Animal Science, Kyungpook National University, 386 Gajang-dong Sangju, Kyungpook, 742-711, Korea .
authors: C D
authors: CD
authors: Kim
authors: Department of Animal Science, Chonbuk National Univ., 567 Baekje-daero Deokjin-gu Jeonju, Jeollabuk-do 561-756, Korea .
authors: I H
authors: IH
authors: Hwang
authors: Hanwoo Improvement Center, National Agricultural Cooperative Federation, 6-10 Wonbul-ri Unsan-Myun Seosan, Chungcheongnam-do, 356-831, Korea .
authors: C Y
authors: CY
authors: Kim
authors: College of Agriculture, Yanbian University, Park Road 977 133002 Yanji, Jilin, China .
authors: X
authors: X
authors: Jin
authors: College of Agriculture, Yanbian University, Park Road 977 133002 Yanji, Jilin, China .
authors: C G
authors: CG
authors: Yang
authors: Department of Animal Science and Technology, Sunchon National University, Sunchon, 540-742, Korea .
authors: K S
authors: KS
authors: Seo
keywords: Genetic Distance; Genetic Diversity; Hanwoo; Phenotypic Characteristics; Phylogenetic Tree