Impact of genetic potential for residual feed intake and diet fed during early- to mid-gestation in beef heifers on carcass characteristics and meat quality attributes of their castrated male offspring.

Autor: Meale SJ; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Ruiz-Sanchez AL; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Dervishi E; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Roy BC; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Paradis F; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada; Agriculture and Agri-Food Canada, Edmonton, AB T6G 2C8, Canada., Juárez M; Agriculture and Agri-Food Canada, Lacombe, AB, T4L 1W1, Canada., Aalhus J; Agriculture and Agri-Food Canada, Lacombe, AB, T4L 1W1, Canada., López-Campos Ó; Agriculture and Agri-Food Canada, Lacombe, AB, T4L 1W1, Canada., Das C; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Li C; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada; Agriculture and Agri-Food Canada, Edmonton, AB T6G 2C8, Canada., Block H; Agriculture and Agri-Food Canada, Lacombe, AB, T4L 1W1, Canada., Colazo MG; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Straathof C; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Bruce HL; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada., Fitzsimmons C; Department of Agriculture, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada; Agriculture and Agri-Food Canada, Edmonton, AB T6G 2C8, Canada. Electronic address: cfitzsim@ualberta.ca.
Jazyk: angličtina
Zdroj: Meat science [Meat Sci] 2021 Dec; Vol. 182, pp. 108637. Date of Electronic Publication: 2021 Jul 22.
DOI: 10.1016/j.meatsci.2021.108637
Abstrakt: Carcass attributes of steers were examined for influences of selection for residual feed intake (RFI), and exposure to different levels of prenatal nutrition. Heifers characterized for RFI corrected for backfat were mated to bulls with genetic potential for either High-RFI or Low-RFI, such that the progeny were expected to be H/H or L/L RFI (sire/dam). Pregnant heifers were assigned to a low diet (Ldiet; 0.40 kg/d ADG), or moderate diet (Mdiet; 0.57 kg/d ADG), from 30 to 150 days of gestation, after which all heifers were managed similarly. Steer offspring (n = 23) were also managed similarly until slaughter. Dressing percentage of steers from H-RFI dams/sires exposed to Ldiet during gestation was lower than all other groups (P = 0.02). Marbling was greater for steers from H-RFI parents, as was fat content of longissimus thoracis et lumborum and triceps brachii (P ≤ 0.02). Results suggest that parental selection for RFI and prenatal maternal diet can influence carcass characteristics of progeny.
(Crown Copyright © 2021. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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