Reproductive Performance for Four Breeds of Swine: Crossbred Females and Purebred and Crossbred Boars

摘要: Purebred and two-breed cross (F1) boars were mated to F1 females produce all possible three- four-breed pigs involving the Duroc, Yorkshire, Landrace Spotted breeds. Individual postweaning average daily gain (ADG), age at 100 kg (AGE) probed backfat thickness (BF) data collected on 3,456 pigs. A total of 213 pens with an 15.58 per pen was evaluated for feed-to-gain ratio (F/G) feed consumption (ADF). Genotype X environment interactions, specifically breed year-season farrowed parity (for ADG), found be highly significant. Certain results, however, reasonably consistent across environments. Duroc-sired grew more efficiently than other sire groups (3.11 vs 3.21 F/G), although there no significant differences in ADF between groups. had less BF three-breed pigs, based upon within dam comparisons, suggesting composition efficient Landrace-sired fatter No real crossbred-sired contemporary pure-bred-sired apparent F/G, ADF, ADG, AGE, or BF. Assuming paternal heterosis zero, these results suggested recombination effects negligible performance traits. Apart from via direct genetic effects, mating crossbred rather purebred different breeding should have little impact feedlot offspring produced.