Naslov
Effects of rapid inbreeding on sow fertility traits in a closed herd of Swedish Landrace

Autori
Belić, Tomica ; Jurić, Ivan ; Đikić, Marija ; Čurik, Ino

Izvornik
Acta Agraria Kaposváriensis (1418-1789) 6 (2002), 2; 189-193

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, izvorni znanstveni rad, znanstveni

Ključne riječi
inbreeding depression ; litter size ; piglet mortality

Sažetak
In this study we analyzed the effects of rapid inbreeding, calculated from three generations long pedigrees, on fertiliy trans of sows. The analysis was based on 72 inbred (ranging from inbreeding coefficient 3.12 to 31.250 and 89 non-inbred sows of Swedish Landrace and all fertility traits were related to the first litter. The analvsis was done by regressing fertility traits on inbreeding coefficients (univariate models). The effect of the age of .sow at the first successful conception sxed) was also included finto regression models. The available data did not let us to consider the effects of litter inbreeding. When dependent variable was litter size (total number borty and number boru alive) and number at weaning, the linear regression model was applied. Dependent variables that were distributed according to Poisson distribution, as fit was base for the number born dead, mortality during weaning and total number of inseminations, were analyzed by generalized linear regression models assuming Poisson distribution. Significant inbreeding depression was obtained for total number born (b=-0.103, P<0.001), number boru alive (b=-0.0910, P<0.01), number at weaning (b=-0.078, P<0.01) as well as the number born dead (P<0.01). On the other hand, signřficant inbreeding depression was not present for the total number of inseminations (P=0.867) and mortality during weaning (P=0.068). Thus, fit was shown that higher inbreeding of sows leads to the reduced fertility

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA