Naslov
Genetic evaluation for calving ease in Croatian Simmental breed

Autori
Špehar, Marija ; Gorjanc, Gregor ; Ivkić, Zdenko ; Bulić, Vesna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the 46th Croatian and 6th International Symposium on Agriculture / Pospišil, Milan - Zagreb : Agronomski fakultet Sveučilišta u Zagrebu, 2011, 217-218

ISBN
9789536135844

Skup
46th Croatian and 6th International Symposium on Agriculture

Mjesto i datum
Opatija, Hrvatska, 14.02.2011. - 18.02.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Simmental cattle; calving ease; genetic parameters

Sažetak
Calving ease has a growing importance from an economic standpoint as well as animal welfare. The objective of this study was to estimate genetic parameters for calving ease in Croatian Simmental breed. Data for 399, 344 first and later calvings were taken from the central database of Croatian Agricultural Agency. The number of animals in pedigree was 551, 368. Calving ease in the first and later parities was treated as separate traits using a bivariate normal model. Fixed effects in the model were: calving season, interaction of sex, calving age, and parity, and interaction of region and calving year. Herd and calving year interaction, direct and maternal additive genetic effects were included as random effects for first and later parities, while permanent effect was included only for later parities. Variance components were estimated using REML method as implemented in the VCE-6 program. The estimated variances (±standard error) for the first and later parities (correlations) were: 0.029±0.002, 0.021±0.001 (0.720) for herd-year, 0.008±0.002, 0.007±0.001 (0.894) for direct genetic, 0.009±0.002, 0.011±0.001 (0.823) for maternal genetic, and 0.003±0.0006 for permanent effect. Results provide genetic parameters for the application of genetic evaluation for calving ease in Croatian Holstein breed.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA