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Diet and genotype effects on the quality index of beef produced in the Argentine Pampeana region

Steers of varying genotypes (Aberdeen Angus, Charolais x AA and Argentine Holstein) in four feeding systems were evaluated. Feeding systems were: S1 = a diet based on pastures only; S2 = a similar forage base as S1 plus a daily supplementation with cracked corn, at 0.7% of l.w./head/day; S3 = a simi...

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Main Authors: Latimori, Nestor Juan, Kloster, Andres Maria, Garcia, Pilar Teresa, Carduza, Fernando Jose, Grigioni, Gabriela Maria, Pensel, Norma Ana
Format: info:ar-repo/semantics/artículo
Language:Inglés
Published: Elsevier 2019
Subjects:
Ganado Bovino
Buey
Genotipos
Dieta
Carne de Res
Calidad
Cattle
Bullocks
Genotypes
Diet
Beef
Quality
Argentina
Novillo
Región Pampeana
Online Access:https://www.sciencedirect.com/science/article/pii/S0309174007003130
http://hdl.handle.net/20.500.12123/6119
https://doi.org/10.1016/j.meatsci.2007.10.008
Summary:Steers of varying genotypes (Aberdeen Angus, Charolais x AA and Argentine Holstein) in four feeding systems were evaluated. Feeding systems were: S1 = a diet based on pastures only; S2 = a similar forage base as S1 plus a daily supplementation with cracked corn, at 0.7% of l.w./head/day; S3 = a similar forage base as S1 plus a daily supplementation with cracked corn, at 1.0% of l.w./head/day; and S4 = a regular feedlot diet. Tenderness and marbling were not affected by the feeding system. Feedlot meat showed an n-6/n-3 ratio significantly higher than meat produced with the diets based on pastures (S1 = 2.1; S2 = 3.1; S3 = 4.5; S4 = 14.2) (P < 0.05), whereas CLA content had an inverse behavior, showing S1 (0.67%) and S2 (0.64%) higher concentrations than S3 (0.55%) and S4 (0.28%) (P < 0.05). Diet based on pastures plus a low level of supplementation produced meat with better nutritional characteristics than other productive alternatives, without significant effects of the biotypes.

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