Abstract
Heritabilities and genetic correlations of economic traits were estimated with a multiple-trait animal model on 5 different strains of Korea Native Chickens (KNC): Red Brown (RB), Yellow Brown (YB), Gray Brown (GB), Black (B) and White (W). The data used for this study were collected from the Daejeon branch of the National Livestock Research Institute and included 11,233 performance records and 12,729 individual animals. DFREML and SAS BASE/STAT packages were used to estimate genetic parameters and descriptive statistics. The estimated heritabilities for strain RB, YB, GB, B and W, respectively, for age at 1st egg were 0.24, 0.27, 0.12, 0.32 and 0.18; for body weight at first egg were 0.39, 0.43, 0.38, 0.52 and 0.57; for body weight at age of 270 days were 0.43, 0.51, 0.30, 0.52 and 0.67; for egg weight at first egg were 0.08, 0.13, 0.07, 0.06 and 0.07; for egg weight at age of 270 days were 0.37, 0.43, 0.22, 0.34 and 0.41; and for number of eggs laid by age of 270 days were 0.24, 0.25, 0.37, 0.36 and 0.30. The genetic and phenotypic correlations were also estimated.
Highlights
The first introduction of Korean Native Chicken (KNC) was not clear it was assumed to be introduced through south and north China about 2,000 years ago
The Korean farmers reared KNC for the purpose of increasing body weight as well as egg production because the KNC was known as dual purpose breed with respect to consumer
The great genetic potential of these traits will be helpful for genetic improvement of the objective traits through selection for superior sires and dams
Summary
The first introduction of Korean Native Chicken (KNC) was not clear it was assumed to be introduced through south and north China about 2,000 years ago. Pursuing an efficient selection and genetic improvement of chickens, various authors have studied and published on estimation of genetic parameters on egg production and growth (Lush, 1948; Lerner and Cruden, 1951; King and Henderson, 1954; Kinney, 1969; McClung et al, 1976). Han et al (1986) published on genetic parameters of economic traits in KNC named O-Gol and Jung et al (1992) reported the estimated heritabilities and genetic correlations among economic traits on KNC. Since 1950’s, numerous studies have been reported on the heritability estimates for the age at first egg, egg production, and egg
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