Effects of genomic estimated breeding value and dietary energy to protein ratio on growth performance, carcass trait, and lipogenic gene expression in Hanwoo steer.
Animal
; 17(4): 100728, 2023 Apr.
Article
en En
| MEDLINE
| ID: mdl-36870258
ABSTRACT
"Genome-based precision feeding" is a concept that involves the application of customised diets to different genetic groups of cattle. We investigated the effects of the genomic estimated breeding value (gEBV) and dietary energy to protein ratio (DEP) on growth performance, carcass traits, and lipogenic gene expression in Hanwoo (Korean cattle) steers. Forty-four Hanwoo steers (BWâ¯=â¯636â¯kg, ageâ¯=â¯26.9â¯months) were genotyped using the Illumina Bovine 50â¯K BeadChip. The gEBV was calculated using genomic best linear unbiased prediction. Animals were separated into high gEBV of marbling score or low-gMS groups based on the upper and lower 50% groupings of the reference population, respectively. Animals were assigned to one of four groups in a 2â¯×â¯2 factorial arrangement high gMS/high DEP (0.084â¯MJ/g), high gMS/low DEP (0.079â¯MJ/g), low gMS/high DEP, and low gMS/low DEP. Steers were fed concentrate with a high or low DEP for 31â¯weeks. The BW tended to be higher (0.05â¯<â¯Pâ¯<â¯0.1) in the high-gMS groups compared to the low-gMS groups at 0, 4, 8, 12, and 20â¯weeks. The average daily gain (ADG) tended to be lower (Pâ¯=â¯0.08) in the high-gMS group than in the low-gMS group. Final BW and measured carcass weight (CW) were positively correlated with the gEBV of carcass weight (gCW). The DEP did not affect ADG. Neither the gMS nor the DEP affected the MS and beef quality grade. The intramuscular fat (IMF) content in the longissimus thoracis (LT) tended to be higher (Pâ¯=â¯0.08) in the high-gMS groups than in the low-gMS groups. The mRNA levels of lipogenic acetyl-CoA carboxylase and fatty acid binding protein 4 genes in the LT were higher (Pâ¯<â¯0.05) in the high-gMS group than in the low-gMS group. Overall, the IMF content tended to be affected by the gMS, and the genetic potential (i.e., gMS) was associated with the functional activity of lipogenic gene expression. The gCW was associated with the measured BW and CW. The results demonstrated that the gMS and the gCW may be used as early prediction indexes for meat quality and growth potential of beef cattle.
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Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Genoma
/
Genómica
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Animal
Año:
2023
Tipo del documento:
Article