美国养猪课件Swine Breeds and Anatomy

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1、SwineBreedsUSSwineBreedsMaternalBreedsSire/CarcassBreedsMinorBreedsSwineCompanyGeneticsFourClassifications-40Worldwide-Only8IndustryImpactMaternalBreedsDeveloped:YorkcountyEnglandImportedin1830Characteristics:WhitewithAlargebreedNotedFor:MaternalcharacteristicsMostcarcassorientedo

2、fMotherbreedsYorkshireMaternalBreedsDeveloped:FromDanishLandrace1930’simportedCharacteristics:WhitewithFinebonedDistinctivelylongbodiedNotedFor:LandraceMaternalBreedsDeveloped:ChesterCoPennsylvaniaMid1800’sfromWhitehogsintheareaCharacteristics:WhitebodyMoreBone“Ruggeddesigncompare

3、dtoothermotherbreeds”NotedFor:ChesterWhiteSire/CarcassBreedsDeveloped:HampshireCo.EnglandImportedin1825toKentuckyCalled“ThinRinds”Majorgrowthin30’sCharacteristics:NotedFor:CarcassTraitsHampshireSire/CarcassBreedsDeveloped:NewJerseyRedsSirenamed“Duroc”Characteristics:RedbodyVariati

4、onislighttodarkNotedFor:Ruggedness/durabilityDurocSire/CarcassBreedsDeveloped:BerkshireEnglandCharacteristics:Blackwith6–whitepointsNotedFor:TruePureBreedBerkshireGoldBerkshireSire/CarcassBreedsPolandChinaDeveloped:3CountiesinOhioCharacteristics:6whitepointsNotedFor:LeanandMuscula

5、rHighproduction:Sire/CarcassBreedsSpotDeveloped:IndianaCharacteristics:DroopedearsBlackandWhitespotsNotedFor:FeedEfficiency(fastgaining)MeatQualitiesSire/CarcassBreedsDeveloped:BelgiumCharacteristics:SpottedNotedFor:Pietrain