Effects of different maternal nutrition approaches on weight gain and on adipose and muscle tissue development of young bulls in the rearing phase

This study evaluated the effects of prenatal nutrition on body weight (BW), average daily gain (ADG), rump fat thickness (RFT), backfat thickness (BFT), ribeye area (REA), muscle cell area (MCA), and the number of cells in REA (NCREA) of young Nellore bulls during the rearing period. After pregnancy...

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Bibliographic Details
Published in:Tropical animal health and production 2021-12, Vol.53 (6), Article 536
Main Authors: Polizel, Guilherme Henrique Gebim, de Francisco Strefezzi, Ricardo, Cracco, Roberta Cavalcante, Fernandes, Arícia Christofaro, Zuca, Cassiano Bordignon, Castellar, Henrique Hespanhol, Baldin, Geovana Camila, de Almeida Santana, Miguel Henrique
Format: Article
Language:English
Subjects:
Animals
Biomedical and Life Sciences
Body weight
Body weight gain
Environmental conditions
Evaluation
Human nutrition
Life Sciences
Muscles
Nutrition
Offspring
Phenotypes
Physical growth
Pregnancy
Proteins
Regular Articles
Thickness
Variance analysis
Veterinary Medicine/Veterinary Science
Zoology
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Summary:This study evaluated the effects of prenatal nutrition on body weight (BW), average daily gain (ADG), rump fat thickness (RFT), backfat thickness (BFT), ribeye area (REA), muscle cell area (MCA), and the number of cells in REA (NCREA) of young Nellore bulls during the rearing period. After pregnancy confirmation (30 days of pregnancy), 126 Nellore cows were separated into three prenatal nutritional treatments (NP (control; 0.03% of BW), only mineral supplementation; PP (0.3% of BW), protein-energy supplementation in the final third; and FP (0.3% of BW) protein-energy supplementation during the entire pregnancy). After calving, all animals were submitted to the same environmental conditions (sanitary and nutritional) and the different supplementation protocols ceased. The males (63 bulls) were evaluated during the entire rearing phase (210 ± 28 days to 540 ± 28 days of age) to weight gain (BW and ADG), carcass characteristics (RFT, BFT, and REA), and for histological assessments (MCA and NCREA; 7 animals per treatment randomly selected). All phenotypes were subjected to an analysis of variance. The different prenatal stimuli had no effect on BFT, RFT, MCA, and NCREA ( P  > 0.05); however, prenatal nutrition influenced BW of the animals during the rearing phase ( P  
ISSN:0049-4747
1573-7438
DOI:10.1007/s11250-021-02982-y