Effect of dietary inclusion of triticale dried distillers' grain and oilseeds on quality and fatty acid profile of meat from feedlot steers

This study compared carcass, meat quality and fatty acid profiles of longissimus thoracis (LT) from feedlot cattle fed barley grain with or without oilseed (OS). Six diets containing no oilseed (No-OS), 10% ground flaxseed (FS), 10% high oleate sunflower seeds (SS) with or without 30% triticale dried distiller's grain (DDGS) were prepared. Feeding DDGS increased chroma at 24 and 144 h post mortem. Feeding FS increased weighff of LT PUFA (P < 0.05) compared to No-OS or SS. An OS by DOGS interaction occurred for 18:3n-3 (P < 0.05) where FS increased weight of 18:3n-3 (P < 0.05), a response accentuated (P < 0.05) by DDGS. Feeding DDGS increased weight% of LT 18:2n-6 (P < 0.05), but neither os nor DOGS affected conjugated linoleic acid (CIA, t7,c9 & c9, t11-18:2). Feeding FS increased weight% of n-3 FA, and both FS and SS increased t10-18:1 with no effect on CIA or t11-18:1. Combination feeding of DDGS and FS further increased weight% of n-3 FA and tempered increases in t10-18:1 with no effect on CIA or t11-18:1. The findings suggest a new strategy to increase beef omega-3 fatty acids efficiently through inclusion of a combination of DDGS and FS in feedlot diet. (C) 2014 Published by Elsevier Ltd.