Results (
Thai) 1:
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Depth of backfat and KPH percentage were not affected (P = 0.44and 0.80, respectively) by vitamin A restriction.// Carcass weight, composition of edible carcass, and yield grade were similar among treatments (P > 0.10).// Liver retinol (LR = 6.1, SR = 6.5, and control = 44.7 g/g; P < 0.01) was reduced in LR and SR vs.// control steers.// On d 243, LR and SR steers had similar serum retinol concentrations, and these were lower (P < 0.01) than those of control steers (LR = 21.2, SR = 25.2, and control = 36.9 g/dL).// Intramuscular adipose cellularity (adipocytes/mm2 and mean adipocyte diameter) on d 112 and 243 was not affected (P > 0.10) by vitamin A restriction.// Restricting vitamin A intake for 243 d increased i.m. fat percentage without affecting s.c. or visceral fat deposition, feedlot performance, or carcass weight.// Restricting vitamin A intake for 131 d at the end of the finishing period appears to be insufficient to affect the site of fat deposition in Holstein steers
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