Meat quality of young Nellore bulls with low and high residual feed intake
| Autor: | Tatiana Lucila Pires Sobrinho, Marcio de Souza Duarte, Karina Zorzi, Augusto César de Queiroz, Renata Helena Branco, Sarah Figueiredo Martins Bonilha |
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| Rok vydání: | 2013 |
| Předmět: |
Male
Sarcomeres Meat Animal feed Animal food animal diseases Carcass Color Biology Beef cattle Tenderness Myofibrils medicine Animals Dry matter Food science Least-Squares Analysis Muscle Skeletal Body Weight food and beverages Animal Feed Diet Longissimus Feedlot Animal Nutritional Physiological Phenomena Cattle Collagen Stress Mechanical medicine.symptom Residual feed intake Beef Energy Intake Food Science |
| Zdroj: | LOCUS Repositório Institucional da UFV Universidade Federal de Viçosa (UFV) instacron:UFV |
| ISSN: | 0309-1740 |
| Popis: | Fifty-nine Nellore bulls from low and high residual feed intake (RFI) levels were studied with the objective of evaluating meat quality traits. Animals were slaughtered when ultrasound-measured backfat thickness reached 4 mm, and samples of Longissimus were collected. A mixed model including RFI as fixed effect and herd and diet as random effects was used, and least square means were compared by t-test. More efficient animals consumed 0.730 kg dry matter/day less than less efficient animals, with similar performance. No significant differences in carcass weight, prime meat cuts proportion, chemical composition, pH, sarcomere length, or color were observed between RFI groups. Shear force, myofibrillar fragmentation index and soluble collagen content were influenced by RFI, with a higher shear force and soluble collagen content and a lower fragmentation index in low RFI animals. Feedlot-finished low RFI young Nellore bulls more efficiently convert feed into meat, presenting carcasses within quality standards. |
| Databáze: | OpenAIRE |
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