Understanding the impact of sire lean meat yield breeding value on carcass composition, meat quality, nutrient and mineral content of Australian lamb. (December 2020)

• Record Type: Journal Article
• Authors: Knight, Matthew I.; Butler, Kym L.; Linden, Nick P.; Burnett, Viv F.; Ball, Alex J.; McDonagh, Matthew B.; Behrendt, Ralph
• Is Part Of: Meat science. Volume 170(2020)
• Publication Date: 2020-12
• Subjects: Lean meat yield -- Meat quality -- Nutrient content -- Mineral content -- Lamb; Meat -- Periodicals; Meat industry and trade -- Periodicals; Viande -- Périodiques; Viande -- Industrie -- Périodiques; Meat; Meat industry and trade; Periodicals; 641.36
• DOI: 10.1016/j.meatsci.2020.108236
• Languages: English
• ISSNs: 0309-1740

Abstract

Abstract: Advances in genomics and technology measuring body composition are now allowing sheep producers to select directly for increased lean meat yield (LMY) using Australian Sheep Breeding Values (ASBV). This experiment evaluated the impact of sire LMY ASBV on carcass composition, meat quality, nutrient and mineral content for lambs reared at pasture and finished in a feedlot. A 1% unit increase in sire LMY ASBV resulted in progeny that were leaner (0.8%) and had less fat (1.0%) on carcass. There was also a 0.2% reduction in the intramuscular fat content, a 3.2 N increase in meat toughness determined by shear force at day 5 ageing, a reduction in the redness of the fresh meat and a lower iron content. It is concluded that Australian sheep producers will need to incorporate ASBVs for other aspects of meat quality when selecting sires with increased LMY to avoid deterioration in meat quality, nutritional content of lamb and fresh meat colour.