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Estimation of variance components for growth traits of korean native cattle by restricted maximum likelihood method



Estimation of variance components for growth traits of korean native cattle by restricted maximum likelihood method



Korean Journal of Animal Science 33(12): 801-805



Restricted maximum likelihood estimates of genetic parameters of growth traits were examined in Korean Native Cattle(HANWOO) and compared with estimates of parameters by Henderson's method 3. Analytic data were collected from 972 heads of purebred of HANWOO tested at Korean Native Cattle Improvement Centre from 1985 to 1988. Sire and error variances were estimated and according to a mixed model that included fixed year-season, location at birth, parity and random sire and error variances. Sire variances by restriction maximum likelihood were estimated higher than those by Henderson's method 3 and error variances by restricted maximum likehood were, on the other hand, estimated lower than those by Henderson's method 3 in most of the growth traits. A large number of iterations were required for variance component estimation by restricted maximum likelihood but if a good initial value would be used the number of iteration could be reduced.

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Accession: 007314839

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