The effect of various factors on traits of performance tested gilts

Abstract

Objective of this research wasto determine the effect of sire breed, genotype of the animal, farm and year on traits of performance tested gilts: age at the end of test (AET), life daily gain (LDG), fat thickenss 1 and 2 (FTL1 and FTL2) and depth of back muscle (MLD). Research included three farms during four consecutive years, and total of 4274 gilts were tested which derivied from 52 boar sires. Sires were pure breeds: Swedish landrace (SL, n=14), Large Yorkshire (LY, n=29), Pietrain (P, n=6) and Durroc (D, n=3), and their daughters belonged to following genotypes: Swedish landrace, large Yorkshire, Pietrain, Duroc, F1 crosses LY×SL, SL×LY and D×SL. It was established that sire breed, genotype of gilts and year had statistically significant (P (lt) 0,01 and P (lt) 0,001) effect on all traits, only the effect of the farm on depth of MLD (P>0,05) wasn't registered. Sires within the breed had no effect on depth of MLD (P>0,05), where in case of sires within the Pietrain breed no effect on traits AET, FTL1 and FTL2 were observed and in case of sires within Duroc breed on AET, and for other traits the effect (P (lt) 0,05 and P (lt) 0,001) of sires within the breed was determined. All traits of gilts depended statistically highly significantly (P (lt) 0,001) on body mass at the end of the test, except depth of back muscle.

Cilj ovog istraživanja je da se utvrdi uticaj rase oca, oca unutar rase, genotipa grla, farme i godine na osobine performans testiranih nazimica: uzrast na kraju testa (UKT), životni dnevni prirast (ŽDP), debljina slanine 1 i 2 (DSL1 i DSL2) i dubina leđnog mišića (MLD). Istraživanjem su obuhvaćene tri farme u četiri uzastopne godine, a ukupno je testirano 4274 nazimica koje vode poreklo od 52 oca-nerasta. Očevi pripadaju čistim rasama: švedski landras (ŠL, n=14), veliki jorkšir (VJ, n=29), pijetren (P, n=6) i durok (D, n=3), dok njihove kćeri pripadaju sledećim genotipovima: švedski landras, veliki jorkšir, pijetren, durok, F1 melezi VJ×SL, ŠL×VJ i D׊L. Utvrđeno je da rasa oca, genotip nazimica i godina utiču statistički značajno (P (lt) 0,01 i P (lt) 0,001) na sve osobine, dok farma jedino nema uticaja na dubinu MLD (P>0,05). Očevi unutar rase nisu uticali na dubinu MLD (P>0,05), pri čemu za očeve unutar rase pijetren nije utvrđen uticaj ni na osobine UKT, DSL1 i DSL2 kao i za očeve unutar rase durok na UKT, dok je za ostale osobine utvrđen uticaj (P (lt) 0,05 i P (lt) 0,001) očeva unutar rase. Sve osobine nazimica su vrlo visoko statistički zavisile (P (lt) 0,001) od telesne mase na kraju testa osim dubine leđnog mišića.