Estimation of heritability coefficients of number of born alive piglets in the first three farrowings Swedish landrace sows | Procena koeficijenta heritabiliteta za broj živorođene prasadi u prva tri prašenja krmača švedskog landrasa

The main objective of this study was to evaluate phenotypic and genetic variation of the number of piglets born alive (NBA) Swedish Landrace sows (SL) in three consecutive parities under the influence of sires, year and season of mating. The study included: 618 litters in the first, 470 in the second and 403 litter in the third farrowing. Testing the homogeneity of variance was performed with Levene's test. The data were analyzed using analysis of variance (Statistica Ver. 6.0., 2003). Heritability coefficients were evaluated by intra-class correlation. Swedish Landrace sires have influenced on the variability of the NBA's daughter in the first and second farrowing (p (lt) 0.05), but not in the third farrowing. Year and season of mating was not influenced on the variability of the NBA (p>0.05). The estimated heritability coefficients for the NBA were the highest in the second (0.123), then the first (0.092) and lowest in the third farrowing (0.030).

Osnovni cilj rada bio je da se oceni fenotipska i genetska varijabilnost broja živorođene prasadi (NBA) krmača švedskog landrasa (SL) u tri uzastopna prašenja pod uticajem očeva, godine i sezone pripusta. Istraživanjem je bilo obuhvaćeno: 618 legala u prvom, 470 u drugom i 403 legla u trećem prašenju. Testiranje homogenosti varijanse izvršeno je testom Levene-a. Dobijeni podaci su obrađeni metodom analize varijanse (Statistica Ver. 6.0., 2003). Koeficijenti heritabiliteta su ocenjeni metodom intra-klasne korelacije. Očevi švedskog landrasa uticali su na varijabilnost NBA kćeri u prvom i drugom prašenju (p (lt) 0.05), ali ne i u trećem prašenju. Godina i sezona pripusta nisu uticale na varijabilnost NBA (p>0.05). Procenjeni koeficijenti heritabiliteta za NBA su bili najviši u drugom (0.123), zatim u prvom (0.092) i najniži u trećem prašenju (0.030).