Effect of different fixed factors on pig carcass quality traits

Abstract

The effect of sire breed (Swedish landrace and large White), sires within the breed, genotype, sex and season of birth of offspring on age at slaughtering, back fat thickness measured on three points (withers, center of the back and rump), length of carcass side Os pubis-atlas and Os pubis-first rib, yield and share of meat in warm carcass sides of average mass of 81,39 kg, using Yugoslav standards, was investigated. Results obtained show that investigated traits of offspring varied between sire breeds, genotype and sex (P lt 0,01). Sires within Swedish Landrace influenced (P lt 0,01) variation of back fat thickness (center of the back, rump, back+rump), age at slaughtering, length of carcass side Os pubis-atlas and Os pubis-first rib, but no effect was established on yield and share of meat (P>0,05). Sires within Large White breed had no effect on age at slaughtering and length of carcass side (P>0,05), whereas on other traits influence was demonstrated (P lt 0,01 and P lt 0,05). Season of birth had influence in the second model (P lt 0,05) on age at slaughtering and in both models on length of carcass side Os pubis-atlas and Os pubis-first rib (P lt 0,01 and P lt 0,05), whereas on other investigated traits no effect was established (P>0,05). Age, back fat thickness, length of carcass side and yield of meat were dependent on the mass of warm carcass sides.

Ispitivan je uticaj rase oca (švedski landras i veliki jorkšir), očeva unutar rase, genotipa, pola i sezone rođenja potomaka na uzrast pri klanju, debljinu slanine merene na tri mesta (greben, sredina leđa i krsta), dužine polutke Os pubis-atlas i Os pubis-prvo rebro, prinos i udeo mesa u toplim polutkama prosečne mase 81,39 kg, primenom Jugoslovenskog standarda. Rezultati koji su dobijeni pokazuju da ispitivane osobine potomaka varirale između rase očeva, genotipa i pola (P lt 0,01). Očevi unutar rase švedski landras su uticali (P lt 0,01) na variranje debljine slanine (sredina leđa, krsta, leđa+krsta) i (P lt 0,05) na uzrast pri klanju, dužine polutke Os pubis-atlas i Os pubis-prvo rebro dok na prinos i udeo mesa nije ispoljen uticaj (P>0,05). Očevi unutar rase veliki jorkšir nisu uticali na uzrast pri klanju i dužine polutki (P>0,05) dok su na ostale osobine ispoljili uticaj (P lt 0,01 i P lt 0,05). Sezona rođenja uticala je u drugom modelu (P lt 0,05) na uzrast pri klanju i u oba modela na dužine polutke Os pubis-atlas i Os pubis-prvo rebro (P lt 0,01 i P lt 0,05) dok na ostale ispitivane osobine nije utvrđen uticaj (P>0,05). Uzrast, debljine slanine, dužine polutke i prinos mesa zavisili su od mase toplih polutki.