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The effect of extended post-mortem ageing on the Warner–Brazler shear force of longissimus thoracis from beef heifers from two sire breeds, slaughtered at 20 or 25 mo of age
- Source :
- Irish Journal of Agricultural and Food Research, Irish Journal of Agricultural and Food Research, 2020, 59 (1), pp.206-214. ⟨10.15212/ijafr-2020-0116⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- The effects on tenderness of extended ageing of longissimus thoracis (LT, striploin) muscle that differed in structure and composition were examined. Spring-born Angus × Holstein-Friesian heifers (n = 48) and Belgian Blue × Holstein-Friesian heifers (n = 48) were slaughtered, within sire breed, at 20 or 25 mo of age. Approximately 48 h post-mortem, LT steaks (2.5 cm) were removed, and either stored at −20°C for chemical analysis or vacuum-packed, stored at 2°C for 7, 14 or 28 d post-mortem and then at −20°C pending Warner–Bratzler shear force (WBSF) analysis. Muscle from Angus-sired heifers had higher (P < 0.001) intramuscular fat (IMF) concentration, lower (P < 0.001) proportion of type IIX muscle fibres and higher (P < 0.001) proportion of type IIA and type I muscle fibres compared to muscle from Belgian Blue-sired heifers. Collagen characteristics did not differ between sire breeds. Later slaughter increased (P < 0.001) IMF concentration and decreased (P < 0.001) total and insoluble concentrations and collagen solubility. There were no interactions between the main effects for WBSF and no difference between sire breeds. Later slaughter and increasing the duration of ageing decreased (P < 0.05) WBSF. Based on threshold WBSF values in the literature, all samples would be considered tender (
- Subjects :
- breed
animal diseases
Longissimus Thoracis
wet ageing
Biology
instrumental texture
Collagen solubility
0404 agricultural biotechnology
Animal science
medicine
2. Zero hunger
Ecology
Sire
0402 animal and dairy science
food and beverages
04 agricultural and veterinary sciences
040401 food science
040201 dairy & animal science
Breed
Tenderness
Ageing
Belgian Blue
Animal Science and Zoology
Intramuscular fat
medicine.symptom
Beef
Agronomy and Crop Science
[SDV.AEN]Life Sciences [q-bio]/Food and Nutrition
Food Science
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Irish Journal of Agricultural and Food Research, Irish Journal of Agricultural and Food Research, 2020, 59 (1), pp.206-214. ⟨10.15212/ijafr-2020-0116⟩
- Accession number :
- edsair.doi.dedup.....86a767028838e9c621be36f719297f2e