Montelli, N L L L

Alvarenga, T I R C

Almeida, A K

Alvarenga, F A P

Furusho-Garcia, I F

Greenwood, P L

Pereira, I G

2021-03

<p>The aim of this study was to investigate the effects of feed efficiency classifications on live animal measurements, circulating IGF-1 and leptin concentrations, and carcass, non-carcass and meat quality traits of lambs. One-hundred and two lambs approximately 70 days-old with initial live weight of 24.6 ± 3.71 kg (mean ± SD) were individually fed for 56 days to determine residual feed intake (RFI) and residual feed intake and gain (RIG). Lambs were then classified as phenotypically Low-, Medium- or High-RFI and Low-, Medium- or High-RIG phenotypes. Circulating leptin and IGF-1 concentrations were higher in more efficient lambs (Low-RFI or High-RIG). Variation in RFI and RIG did not affect meat redness or tenderness, but High-RIG lambs had darker meat. These findings show that the phenotypically more efficient Low-RFI and High-RIG lambs produced carcasses with similar characteristics and meat quality as the less efficient High-RFI and Low-RIG lambs but have a strategic advantage of lower feed intake to achieve similar production outcomes.</p>

Meat Science, v.173, p. 1-8

1873-4138

0309-1740

https://hdl.handle.net/1959.11/51607

en

Elsevier BV

Associations of feed efficiency with circulating IGF-1 and leptin, carcass traits and meat quality of lambs

Journal Article

Publication