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Article

Genetic analysis of days from calving to first insemination and days open in Danish Holsteins using different models and censoring scenarios.

Journal of dairy science - 1 Mar 2009

Hou Y, Madsen P, Labouriau R, Zhang Y, Lund M S, Su G

Abstract excerpt

The objectives of this study were to estimate genetic parameters and evaluate models for genetic evaluation of days from calving to first insemination (ICF) and days open (DO). Data including 509,512 first-parity records of Danish Holstein cows were analyzed using 5 alternative sire models that dealt with censored records in different ways: 1) a conventional linear model (LM) in which a penalty of 21 d was added...

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PMID: 19233816
DOI: 10.3168/jds.2008-1556

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