SheepSheep, DomesticBreedingAnimals, Inbred StrainsSheep DiseasesAnimal HusbandryGenetic VariationMicrosatellite RepeatsPrionsGenotypeSpecies SpecificityGenetics, PopulationPolymorphism, GeneticHybrid VigorCattleWeaningWoolCrosses, GeneticGoatsLeast-Squares AnalysisDog DiseasesMeatDogsSheep, BighornLitter SizeBody WeightReproductionSwineAnimals, DomesticScrapieWeight GainJaagsiekte sheep retrovirusHorsesInbreedingSus scrofaAnimal FeedEquidaePregnancyBirth WeightSeasonsFertilityGoat DiseasesPhylogenyPortugalQuantitative Trait, HeritableDystociaLactationHaplotypesModels, GeneticGene FrequencyAnimal Identification SystemsBody CompositionPolymorphism, Single NucleotideChromosomes, MammalianMilkAllelesPregnancy, AnimalHybridization, GeneticGenetic MarkersPhenotypeSexual MaturationFetusHeterozygoteCattle DiseasesSelection, GeneticGenomeSequence Analysis, DNAScrotum