Performance, nutrient utilization and meat quality traits in Bos indicus cattle: a meta-analysis examining the effect of residual feed intake.

Autor: Vesga DA; School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil., Torres RNS; School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil., Moreira JBS; School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil., Granja-Salcedo YT; El Nus Research Center, Colombian Agricultural Research Corporation, San Roque, Antioquia, Colombia., Neto ORM; School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil.; School of Veterinary Medicine and Animal Science, São Paulo State University, Botucatu, São Paulo, Brazil., Chardulo LAL; School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil.; School of Veterinary Medicine and Animal Science, São Paulo State University, Botucatu, São Paulo, Brazil., Nair MN; Department of Animal Sciences, Colorado State University, Fort Collins, Colorado, USA., Carvalho PHV; Department of Animal Sciences, Colorado State University, Fort Collins, Colorado, USA., Baldassini WA; School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil. w.baldassini@unesp.br.; School of Veterinary Medicine and Animal Science, São Paulo State University, Botucatu, São Paulo, Brazil. w.baldassini@unesp.br.
Jazyk: angličtina
Zdroj: Tropical animal health and production [Trop Anim Health Prod] 2024 Jul 15; Vol. 56 (6), pp. 214. Date of Electronic Publication: 2024 Jul 15.
DOI: 10.1007/s11250-024-04072-1
Abstrakt: This meta-analysis aims to investigate the effects of residual feed intake (RFI) phenotype on performance, nutrient utilization and meat quality traits in Zebu (Bos indicus) cattle. Twenty-three peer-reviewed publications with 37 treatment means were included in the dataset. Weighted mean difference analysis compared animals categorized into low RFI (more efficient) versus medium or high RFI (less efficient) groups. Data heterogeneity via meta-regression and subgroup analysis, considering variables such as animal age, sex class, experimental duration, RFI group, dietary concentrate, and estimated metabolizable energy intake were also explored. The predominant genetic group of cattle in the dataset was Nellore (89.18%), followed by Brahman (10.81%). More efficient animals (low RFI phenotype) exhibited less dry matter intake (DMI; P < 0.010) than medium or high RFI animals (-0.95 kg vs. -0.42 kg/d). Cattle dietary crude protein and fiber digestibility were consistent across RFI groups (P > 0.05), while dietary ether extract digestibility tended to decrease (P = 0.050) in low RFI animals (-13.20 g/kg DM). Low RFI animals tended to increased (P = 0.065) ribeye area (REA) compared to the high/medium RFI groups, while carcass backfat thickness (BFT) decreased (P = 0.042) compared to high/medium RFI groups. Moreover, there was an increase (P < 0.001) of 0.22 kg in Warner-Bratzler shear force (WBSF) and a reduction (P < 0.001) in the myofibrillar fragmentation index (MFI) in low RFI animals. Meat color parameters (lightness [L*] and yellowness [b*]) and visual marbling scores were consistent (P > 0.05) across RFI groups. In conclusion, Zebu cattle classified as efficient (low RFI) exhibited reduced DMI, which improves their feed efficiency. However, BFT and meat quality parameters such as tenderness (WBSF and MFI) and redness [a*] were compromised by low RFI phenotype, highlighting the challenge of enhancing feed efficiency and meat quality traits in Zebu cattle.
(© 2024. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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