Short communication: Validation of two animal models for estimation of genetic trends for female fertility in Norwegian dairy cattle.

Abstract

Two animal models were compared with respect to potential bias in genetic trend estimates for female fertility and for their predictive ability. In addition to either a fixed effect for month of first insemination or for month-year of first insemination, the models had fixed effects of age and double insemination and random effects of herd-year and animal… (More)

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