Performance, carcass traits, and gene expression in young bulls fed lipids and monensin
The objective of this work was to evaluate performance, carcass traits, and their correlation with gene expression in young bulls. Forty Red Norte animals were feedlot and distributed in a completely randomized design, using a 2x2 factorial arrangement, and fed ground soybean grains or rumen‑protected fat, with or without monensin supplementation. Diets were formulated to be isonitrogenous, with similar ether extract contents (6.5%), and had corn silage as roughage (40%). The experimental period lasted 84 days, preceded by 14 days of adaptation. The expressions of the PPARA, SREBP1c and SCD1 genes were evaluated. Animals fed rumen‑protected fat had greater average daily gain in the first 56 days of feedlot. Monensin did not affect the daily gain, but increased carcass weight. There was -0.40 correlation between animal daily gain and SCD1 expression. The use of rumen‑protected fat increases animal performance at the beginning of feedlot, and monensin provides greater carcass weight.
| Main Authors: | , , , , , , |
|---|---|
| Format: | Digital revista |
| Language: | por |
| Published: |
Pesquisa Agropecuaria Brasileira
2014
|
| Online Access: | https://seer.sct.embrapa.br/index.php/pab/article/view/18580 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The objective of this work was to evaluate performance, carcass traits, and their correlation with gene expression in young bulls. Forty Red Norte animals were feedlot and distributed in a completely randomized design, using a 2x2 factorial arrangement, and fed ground soybean grains or rumen‑protected fat, with or without monensin supplementation. Diets were formulated to be isonitrogenous, with similar ether extract contents (6.5%), and had corn silage as roughage (40%). The experimental period lasted 84 days, preceded by 14 days of adaptation. The expressions of the PPARA, SREBP1c and SCD1 genes were evaluated. Animals fed rumen‑protected fat had greater average daily gain in the first 56 days of feedlot. Monensin did not affect the daily gain, but increased carcass weight. There was -0.40 correlation between animal daily gain and SCD1 expression. The use of rumen‑protected fat increases animal performance at the beginning of feedlot, and monensin provides greater carcass weight. |
|---|