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.

Genetic diversity and differentiation among Korean-Holstein, Hanwoo, and Uganda-Holstein breeds

“…Any perceived discrepancy in H e and H o among studies could be as a result of differences in the numbers of animals and in the laboratory settings, which could lead to genotyping errors (Egito et al, 2007;Suh et al, 2014). The Korean Holstein group that was characterized in this study was found to be less heterozygous than the Hanwoo cattle, in agreement with Choi et al (2012). Compared with the Hanwoo and Korean-Holstein, the value of H e in Uganda-Holstein was greater than H o for nine of the microsatellites (Table 3).…”

Assessment of Genetic Diversity, Relationships and Structure among Korean Native Cattle Breeds Using Microsatellite Markers

“…Microsatellite analyses have provided useful genetic information for European ( Maudet et al, 2002 ; Wiener et al, 2004 ; Padilla et al, 2009 ), African ( Dadi et al, 2008 ), mid-South American ( Egito et al, 2007 ; Acosta et al, 2013 ) and Asian cattle breeds ( Zhang et al, 2007 ; Pham et al, 2013 ). In Korea, several studies have evaluated the genetic diversity and genetic relationship of HW compared with other breeds ( Kim et al, 2002 ; Choi et al, 2012 ). However, little genetic characterization of JB, HU, and CS has been done.…”

Origin-related study of genetic diversity and heteroplasmy of Mongolian sheep (Ovis arie) using mitochondrial DNA

“…Ten breeds or strains are currently recognized in Mongolia as morphologically and genetically distinct, although it remains unclear whether these represent breeds or strains (Onolragchaa et al, 2019). for biodiversity conservation and sustainable use of resources (Park, 2007;Choi, 2012). As such, the importance of animal genetic resources is emerging worldwide, and genetic studies related to it have been conducted.…”