The profitability, growth and meat quality of grain finished entire male and castrated Bos indicus cattle from a north Australian production system

摘要: The profitability, growth, carcass and meat quality from high grade; grain fed Bos indicus entire male castrated cattle that were either positively or negatively homozygous heterozygous for the calpastatin gene a vertically integrated north Australian production system investigated. Preliminary analysis into profitability of producing vs. domestic market using Breedcow herd budgeting software was undertaken based on hypothetical breeding 1200 cows. Although males had higher gross margins compared to castrates during finishing phase, they unable make up earlier losses $24.04/AE at weaning. There no differences in performance between prior onset puberty on-farm experiment. Following combined with an energy dense ration, grew 27% faster than castrates. temperament (P > 0.05). Entire produced carcasses heavier = 0.005), less marbling 0.001) more mature 0.007) Both animals < All but one qualified as gain yearling beef (GFYG) under Ausmeat selection criteria consequently awarded similar price per kg weights resulted being $50 profitable tougher samples M. Longissimus dorsi after aging 14 days 28 0.005) Selecting didn't affect tenderness. In conclusion can be managed trade, profitably, accordance criteria. addition, tenderness improved by selecting against gene.