Dvolastnostni model za velikost gnezda po zaporednih prasitvah pri prašičih

Betka LOGAR; Milena KOVAČ

doi:10.14720/aas.2001.78.2.15634

Authors

Betka LOGAR Univ. of Ljubljana, Biotechnical Fac., Zootechnical Dept., Groblje 3, SI-1230 Domžale and present address: Agricultural Institute of Slovenia, Hacquetova 17, SI-1001 Ljubljana, Slovenia
Milena KOVAČ Univ. of Ljubljana, Biotechnical Fac., Zootechnical Dept., Groblje 3, SI-1230 Domžale, Slovenia

DOI:

https://doi.org/10.14720/aas.2001.78.2.15634

Keywords:

pigs, reproduction, litter size, statistics, statistical analysis, selection, genetic correlations, animal model, two traits model, repeatability model

Abstract

The aim of the study was to estimate genetic correlations between litter size in gilts and sows for number of born and number of liveborn piglets. Total 24 334 litters of Swedish Landrace (SL), Large White (LW), and both F1 sows; line 12 (SL × LW) and line 21 (LW × SL) were included. High genetic correlations for number of born piglets (0.92) and also for number of liveborn piglets (0.92) were obtained by animal model. Due to high genetic correlations litter size across litters from 1^st to 6^th parity can be treated as the same trait. The estimates of heritability for litter size in gilts and sows were higher for number of born (0.14) than for number of liveborn piglets (0.12). The results confirmed the adequacy of a simple repeatability model in the selection for litter size in the population analyzed.