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Brahmans are known to have poorer carcass quality relative to Bos taurus breeds and crossbreds under temperate environments; however, little is known of their performance in subtropical environments. The Cooperative Research Centre for Cattle and Beef Industry (Meat Quality) initiated a crossbred progeny test experiment to compare straightbredBrahmanswithBrahmancrossbreds finishedonpastureandgrain,insubtropicalandtemperateenvironments,to carcass quality specifications of Australian domestic and export markets. Brahman, Belmont Red, Santa Gertrudis, Angus, Hereford,Shorthorn,CharolaisandLimousinsireswerematedtoBrahmanfemalesinsubtropicalQueenslandover3yearsto produce 1750 progeny. At a common age at slaughter, Charolais crossbreds had the highest hot carcass weight (CWT) but werenotsignificantlyheavierthanLimousinorBritishcrossbredprogeny.Atcommoncarcassweights,breedswithinbreed type (British, Continental, tropically adapted) performed similarly. British and Santa Gertrudis crossbreds had the fattest carcasses and lowest yields. British and Belmont Red crossbreds had the highest intramuscular fat percentage (IMF). Continentalcrossbredshadthehighestretailbeefyield(RBY),kilogramsofretailprimals(RTPM)andpercentretailprimals (pcRTPM) and leanest carcasses. Brahmans had thelowest CWT, intermediate subcutaneous fatcover, highyields andlow IMF.Animals finishedinthesubtropicsonpastureweresignificantlyolder,leanerandhadhigherRBY,RTPMandpcRTPM thansubtropicalfeedlot-finishedcontemporaries.TemperatefeedlotanimalshadsignificantlymoreIMF,lesssubcutaneous fatattheP8siteandslightlyloweryieldsthansubtropicalfeedlotcontemporaries,indicatingpossibleeffectsofpostweaning growth pathonfatdistribution.BelmontRedcrossbredsdemonstratedtheadvantagesofadaptation withthehighestIMFin both subtropical finishing regimes, while Angus progeny had the highest IMF in the temperate feedlot environment and highest IMF overall when analysed across finishing regimes. Significant interactions were mainly the result of scale effects ratherthanbreedre-rankingforcarcasstraitsacrossmarketsand finishingregimes.Therefore,breedsthatperformedwellfor certaincarcasstraitsinsubtropicalenvironmentsperformedconsistentlyforthosetraitsintemperateenvironmentsrelativeto other sire breeds, regardless of market endpoint or finishing nutrition.

Brahman and Brahman crossbred cattle grown on pasture and in feedlots in subtropical and temperate Australia. 1. Carcass quality