title: Impact of Brassica and Lucerne Finishing Feeds and Intramuscular Fat on Lamb Eating Quality and Flavor. A Cross-Cultural Study Using Chinese and Non-Chinese Australian Consumers.
abstract: Use of forage brassicas (Brassica napus) and lucerne (alfalfa; Medicago sativa) as ruminant feeds has been linked to unacceptable flavors in sheepmeat. Lambs from low and high intramuscular fat sires were allocated to one of four finishing feeds-perennial ryegrass (Lolium perenne), lucerne, and two brassica forages-for a 6 week period. Grilled loins (Longissimus thoracis et lumborum) were subjected to chemical and sensory analysis by a trained panel and also evaluated by non-Chinese and Chinese background Australian consumers. Consumer liking was similar for both groups, and liking was highest for the brassica- and lucerne-finished lamb, especially from high intramuscular fat sires. No evidence of a distinctive lucerne- or brassica-induced flavor taint was measured by the trained panel or gas chromatography-mass spectrometry-olfactometry. The diets influenced the composition of lipids and branched-chain fatty acids in the subcutaneous fat, and the concentration of total branched-chain fatty acids was positively correlated with flavor and overall liking. Significantly higher levels of key aroma volatiles were measured in the higher fat samples.
authors: Commonwealth Scientific Industrial Research Organisation (CSIRO) , 11 Julius Avenue, North Ryde, NSW 2113, Australia.
authors: Damian
authors: D
authors: Frank
authors: Commonwealth Scientific Industrial Research Organisation (CSIRO) , 671 Sneydes Road, Werribee, VIC 3030, Australia.
authors: Peter
authors: P
authors: Watkins
authors: Meat & Livestock Australia (MLA) , Level 1, 40 Mount Street, North Sydney, NSW 2060, Australia.
authors: Alex
authors: A
authors: Ball
authors: Commonwealth Scientific Industrial Research Organisation (CSIRO) , 11 Julius Avenue, North Ryde, NSW 2113, Australia.
authors: Raju
authors: R
authors: Krishnamurthy
authors: Commonwealth Scientific Industrial Research Organisation (CSIRO) , 11 Julius Avenue, North Ryde, NSW 2113, Australia.
authors: Udayasika
authors: U
authors: Piyasiri
authors: PGG Wrightson Seeds (Australia) Leigh Creek Research Station , 4 Blackswamp Road, Leigh Creek, VIC 3052, Australia.
authors: James
authors: J
authors: Sewell
authors: Commonwealth Scientific Industrial Research Organisation (CSIRO) , 11 Julius Avenue, North Ryde, NSW 2113, Australia.
authors: Jordi
authors: J
authors: Ortuño
authors: Commonwealth Scientific Industrial Research Organisation (CSIRO) , 39 Kessels Road, Coopers Plains, QLD 4108, Australia.
authors: Janet
authors: J
authors: Stark
authors: Faculty of Veterinary and Agricultural Science, The University of Melbourne , Royal Parade, Parkville, VIC 3010, Australia.
authors: Robyn
authors: R
authors: Warner
mesh_terms: D000821:Animal Feed; D000818:Animals; D044466:Asian People; D001315:Australia; D001937:Brassica; D003296:Cooking; D003431:Cross-Cultural Comparison; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008297:Male; D000455:Medicago sativa; D009812:Odorants / Q000032:analysis; D006109:Poaceae; D000069466:Red Meat / Q000032:analysis*; D034561:Sheep, Domestic; D013649:Taste; D055549:Volatile Organic Compounds / Q000032:analysis
chemical_list: D055549:Volatile Organic Compounds
keywords: alfalfa; branched-chain fatty acids; brassica; glucosinolates; lucerne; olfactometry