The Effect of Various Factors on Traits of Performance Tested Gilts

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 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<0,05 and P<0,001) of sires within the breed was determined. All traits of gilts depended statistically highly significantly (P<0,001) on body mass at the end of the test, except depth of back muscle.