Estimation of genetic parameters for litter traits in Czech pig populations using a multitrait animal model

To chci

Univariate and multivariate analyses were performed for litter size born (NB), born alive (NBA) and at 21 days (NW) for the breeds Large White, Landrace and Přeštické Black Spotted. Variance and covariance components were estimated using REML under an animal model in three different analyses: (i) single-trait analyses within 1st, 2nd and 3rd litter, (ii) three-trait analyses (traits NB, NBA and NW) within litters, and (iii) three-trait analyses considering the given trait in the three different litters as different traits. The model for each analysis included the factors year-season, mating type (artificial insemination or natural service), herd (all fixed), age at 1st breeding or farrowing interval (covariables) and additive genetic effect of the sow (random). Heritability estimates were about 0.10 for all analyses, traits and breeds. High genetic correlations were found between different parities, being highest between 2nd and 3rd litter. The correlations between traits were also high (0.77 to 0.99) for all parities and breeds. … celý popis

Podrobná bibliografie

Další autoři

Jochen Wolf, E. Groeneveld, M. Wolfová, V. Jelínková

Typ dokumentu

Články

Fyzický popis

9 tab

Publikováno v

Czech Journal of Animal Science. -- ISSN 1212-1819. -- Roč. 44, č. 5 (1999), s. 193-199

Témata

prasata > plemena zvířat > velikost vrhu > přežití > genetická kovariance > modelová zvířata > heritabilita > genetická korelace

Bibliografie

Lit. s. 198-199 (25 zázn.) - Res. čes., angl