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Scope for evaluating dairy sires using first and second lactation records

Scope for evaluating dairy sires using first and second lactation records

Livestock Production Science 10(6): 531-553

Model calculations conducted on the value of including 2nd-lactation records in a sire evaluation procedure suggested an increase in accuracy of about 6% for sires with <more or =>25 first-lactation daughters, of which 50-70% surviving to 2nd lactation. A 2-trait Best Linear Unbiased Prediction procedure utilised information from both lactations simultaneously, so that accuracies were improved through additional genetic information and extra connections in the data.

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Accession: 001248773

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DOI: 10.1016/0301-6226(83)90048-9

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