title: Growth, carcass and meat quality traits in beef from Angus, Hereford and cross-breed grazing steers, and their association with SNPs in genes related to fat deposition metabolism.
abstract: Grazing steers from Angus and Hereford breeds, their cross-breeds and a three-way cross-breed (Limousin × Angus-Hereford) were measured for growth, carcass and meat quality traits. Breed effects were studied, and the association of SNPs with fat deposition and fatty acid (FA) composition (leptin, melanocortin-4 receptor, stearoyl-CoA desaturase, FA synthase and thyroglobulin) was tested. Limousin cross-breed showed the greatest final body weight, ultrasound rib eye area, dressing percentage, carcass and leg length, and the lowest backfat thickness and intramuscular fat content. Genetic groups had similar pH, shear force, cooking loss, L* and b* and n-6:n-3 ratio. Meat from 1/2-Angus presented greater a* than Limousin cross-breed. Whereas Angus had the highest total SFA content, Hereford had the lowest total SFA and the highest total MUFA. Limousin cross-breed had greater content of several individual PUFAs, total PUFA, n-6 and n-3 FA than Angus and 1/2-Angus. Leptin and FA synthase were associated with some FAs, supporting their influence over fat metabolism for grazing animals.
authors.affiliation: Área de Investigación en Producción Animal, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina. Electronic address: papaleo.juliana@inta.gob.ar.
authors.forename: J
authors.initials: J
authors.lastname: Papaleo Mazzucco
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), UNLP-CONICET La Plata, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, B1901AAP La Plata, Buenos Aires, Argentina.
authors.forename: D E
authors.initials: DE
authors.lastname: Goszczynski
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), UNLP-CONICET La Plata, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, B1901AAP La Plata, Buenos Aires, Argentina.
authors.forename: M V
authors.initials: MV
authors.lastname: Ripoli
authors.affiliation: Área de Investigación en Producción Animal, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina; Departamento de Producción Animal, Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata (UNMdP), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina.
authors.forename: L M
authors.initials: LM
authors.lastname: Melucci
authors.affiliation: Área de Investigación en Producción Animal, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina.
authors.forename: A M
authors.initials: AM
authors.lastname: Pardo
authors.affiliation: Departamento de Producción Animal, Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata (UNMdP), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina.
authors.forename: E
authors.initials: E
authors.lastname: Colatto
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), UNLP-CONICET La Plata, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, B1901AAP La Plata, Buenos Aires, Argentina; Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE Ciudad de Buenos Aires, Argentina.
authors.forename: A
authors.initials: A
authors.lastname: Rogberg-Muñoz
authors.affiliation: Área de Investigación en Producción Animal, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina.
authors.forename: C A
authors.initials: CA
authors.lastname: Mezzadra
authors.affiliation: Área de Investigación en Producción Animal, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina.
authors.forename: G J
authors.initials: GJ
authors.lastname: Depetris
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), UNLP-CONICET La Plata, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, B1901AAP La Plata, Buenos Aires, Argentina.
authors.forename: G
authors.initials: G
authors.lastname: Giovambattista
authors.affiliation: Área de Investigación en Producción Animal, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nac. 226 km 73.5, 7620 Balcarce, Buenos Aires, Argentina.
authors.forename: E L
authors.initials: EL
authors.lastname: Villarreal
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D001823:Body Composition; D001835:Body Weight; D001947:Breeding; D002417:Cattle; D003116:Color; D003296:Cooking; D003433:Crosses, Genetic; D004041:Dietary Fats / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis*; D005838:Genotype; D006128:Growth; D006801:Humans; D006863:Hydrogen-Ion Concentration; D050356:Lipid Metabolism / Q000235:genetics*; D008297:Male; D008460:Meat / Q000032:analysis* / Q000592:standards; D009132:Muscles / Q000378:metabolism; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D013045:Species Specificity; D013314:Stress, Mechanical
chemical_list: D004041:Dietary Fats; D005227:Fatty Acids
keywords: Angus–Hereford cross-breeds; Carcass; Fatty acids; Growth; Meat quality; Single nucleotide polymorphisms