Effects of different simplified milk recording methods on genetic evaluation with Test-Day animal model

Baldassare Portolano, Cacioppo, Baldassare Portolano

Risultato della ricerca: Article


The aims of the present study were to compare estimated breeding values (EBV) for milk yield using different testing schemes with a test-day animal model and to evaluate the effect of different testing schemes on the ranking of top sheep. Alternative recording schemes that use less information than that currently obtained with a monthly test-day schedule were employed to estimate breeding values. A random regression animal mixed model that used a spline function of days in milk was fitted. EBVs obtained with alternative recording schemes showed different degrees of Spearman correlation with EBVs obtained using the monthly recording scheme. These correlations ranged from 0.77 to 0.92. A reduction in accuracy and intensity of selection could be anticipated if these alternative schemes are used; more research in this area is needed to reduce the costs of test-day recording.
Lingua originaleEnglish
pagine (da-a)195-197
Numero di pagine3
RivistaItalian Journal of Animal Science
Stato di pubblicazionePublished - 2007


All Science Journal Classification (ASJC) codes

  • Animal Science and Zoology

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