Genetic Parameters of Calving Traits at First and Second Calving in Danish Holsteins

作者： J. Pedersen , M. S. Lund , M. Hansen , L. G. Christensen

DOI:

关键词: Statistics 、 Genetic correlation 、 Ice calving 、 Threshold model 、 Linear model 、 Restricted maximum likelihood 、 Bivariate analysis 、 Trait 、 Maternal effect 、 Biology

摘要: The aim of this study was to estimate heritabilities and genetic correlations for stillbirth, calving difficulty, calf size at second between thes e traits first calving. Data originated from Holstein cows 1988 2002. Bivariate threshold models using Gibbs sampling were fitted estimation the For correlation bivariate linear REML fitted. direct maternal 0.05 0.005 0.08 0.04 0.16 fo r size. these high (0.65 0.99) effects moderate (0.44 0.92) effect s. each trait ranged 0.89 0.99 eff ects 0.74 0.88 effects.

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Genetic Parameters of Calving Traits at First and Second Calving in Danish Holsteins

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Genetic Parameters of Calving Traits at First and Second Calving in Danish Holsteins

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