期刊
MEAT SCIENCE
卷 191, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2022.108851
关键词
Betaine; Lipid metabolism; Performance; Pork quality; Ractopamine
资金
- CNPq - Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
- CAPES - Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior
- INCT-CA - Instituto Nacional de Ciencia e Tecnologia de Ciencia Animal
This study evaluated the effects of ractopamine and betaine, supplemented alone or in combination, on the performance, carcass and meat quality, and gene expression of finishing pigs. The results showed that ractopamine improved the performance and carcass traits of pigs, while betaine increased loin muscle area and improved pork quality.
The objective of this study was to evaluate the effects of ractopamine and betaine, supplemented alone or in combination, on live performance, carcass and meat quality traits, and gene expression (in both skeletal muscle and subcutaneous adipose tissue) of finishing pigs. Seventy-two pigs averaging 89.0 & PLUSMN; 3.44 kg were assigned to a control diet (CTRL-without ractopamine and betaine); CTRL+20 mg/kg ractopamine (RAC); CTRL+2.5 g/kg betaine (BET); or RAC + 2.5 g/kg betaine (RAC + BET). Pigs fed RAC and RAC + BET had greater average daily gain and carcass yield compared to CTRL. Pigs fed RAC, BET, and RAC + BET had greater loin muscle area, while backfat thickness was lower in pigs fed RAC + BET compared to CTRL. Pork from BET had lower shear-force and greater intramuscular fat content compared to CTRL. Regarding adipose tissue, RAC and BET increased expression of genes related to lipolysis and 8-oxidation. These data indicate that performance and carcass traits of pigs can be improved with ractopamine, whereas betaine (when fed independently from ractopamine) increased the loin muscle area and pork quality.
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