EBV changes due to different age adjustment factors in the Italian Friesian
Contributo in Atti di convegno
Data di Pubblicazione:
1998
Citazione:
EBV changes due to different age adjustment factors in the Italian Friesian / A. Bagnato, F. Canavesi - In: Opening: plenary; technology; transfer; beef cattle; dairy cattle; pigs. Volume 23[s.l] : World Congress on Genetics Applied to Livestock Production, 1998. - pp. 403-406 (( convegno Proceedings of the World Congress on Genetics Applied to Livestock Production.
Abstract:
Mature equivalent productions are often used as input for breeding values estimation. Adjustment factors can affect genetic trend, thus efforts should be put in order to verily projected production. Adjustment factors used in different countries refer to various ages. EBV changes with adjustment factors projecting lactations to primiparous vs. adjustment factors projecting production to pluriparous were compared. No evident difference was found both in genetic trend and in ranking of sire and cows by changing reference age except for some re-ranking for top 10,000 cows. Effect on genetic trend and EBV variability was found when base parameters of heterogeneity of herd variance were different
Tipologia IRIS:
03 - Contributo in volume
Elenco autori:
A. Bagnato, F. Canavesi
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Link al Full Text:
Titolo del libro:
Opening: plenary; technology; transfer; beef cattle; dairy cattle; pigs. Volume 23