Abstract
ABSTRACT This study was carried out to estimate the average inbreeding coefficients and effective population size (EPS) and to seek alternatives on the problems of Holstein cattle in Korea. The data used in this study was obtained from the Korean Animal Improvement Association (KAIA) and 635,268 heads of Holstein records out of 1,872,195 Holstein registration data were used for the analysis. The average inbreeding coefficients were estimated at a range of 0.11 to 1.07%. The average inbreeding coefficients at the 14 th , 19 th and 22 nd generation were estimated at 0.43%, 0.92% and 1.07%, respectively. The estimated inbreeding coefficients within the range of 0%, 0 to 6.25%, 6.25 to 12.5%, 12.5 to 25%, and >25% were observed in 50.5%, 48.3%, 0.8%, 0.1%, and 0.3% of the animals, respectively. The estimated effective population size (EPS) was 619 heads from the 8 th to 22 nd generation, and 922 heads from the 19 th to 22 nd generation.( Key words : Inbreeding coefficient, Effective population size, Holstein)
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