Pregled bibliografske jedinice broj: 153888
Genetic parameters for number of piglets born alive using random regression model
Genetic parameters for number of piglets born alive using random regression model // Book of Abstracts of the 55th Annual Meeting of the European Association for Animal Production / van der Honing, Ynze (ur.).
Wageningen: Wageningen Academic Publishers, 2004. str. 299-299 (demonstracija, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 153888 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Genetic parameters for number of piglets born alive using random regression model
Autori
Luković, Zoran ; Gorjanc, Gregor ; Malovrh, Špela ; Kovač, Milena
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Book of Abstracts of the 55th Annual Meeting of the European Association for Animal Production
/ Van der Honing, Ynze - Wageningen : Wageningen Academic Publishers, 2004, 299-299
ISBN
9-076-9984-50
Skup
Annual Meeting of the European Association for Animal Production (55 ; 2004)
Mjesto i datum
Bled, Slovenija, 05.09.2004. - 09.09.2004
Vrsta sudjelovanja
Demonstracija
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Random regression; number of piglets born alive; pigs
Sažetak
Genetic parameters for number of piglets born alive (NBA) were estimated using random regression model. Litter records data from three large Slovenian pig farms from the first to the tenth parity were used for analyses. Fixed part of the model included genotype of sow, mating season, parity and weaning to conception interval as class effects. The age at farrowing was adjusted as quadratic regression nested within parity. Previous lactation length was fitted as linear regression. Random regressions on Legendre polynomials of standardized parity were included for direct additive genetic, permanent environmental and common litter environmental effect. Legendre polynomials from the linear power to cubic power were fitted. Heritabilities on all three farms ranged from 0.09 to 0.14. Permanent environmental effect as ratio increased along trajectory from 0.03 to 0.12. Magnitudes of common litter effect were generally small (0.01 to 0.02). The eigenvalues of covariance functions showed that between 10 and 20 % of genetic variability was explained by individual genetic curve of sow. This proportion of variability was mainly covered by linear and quadratic coefficients. The solutions for the random regression coefficients were used to compute breeding value for NBA along trajectory.
Izvorni jezik
Engleski
Znanstvena područja
Poljoprivreda (agronomija)
