PSXV-7 Nutrient Digestibility Evaluation in Finisher Pigs from Diverse Feed Efficiency Groups

Abstract Feed efficiency (FE) is a critical trait in swine production to improve the overall and profitability an important goal for pig breeding companies. FE complex involving utilization storage of dietary nutrients different organs, more especially skeletal muscles. However, whether nutrient digestibility altered by genetic selection less clear. Thus, this study investigated variation apparent total tract (ATTD) finisher boars selected high (HFE) or low (LFE) within Large White dam sire line. A 130 were at 23 wk age based on their genomic-enabled value fed ad libitum corn-soybean meal-based diet using feeding stations that recorded individual feed intake body weight. Fecal samples analyzed dry matter, neutral detergent fiber, acid crude protein (CP), energy, ash, phosphorus, calcium determine ATTD acid-insoluble ash as indigestible marker. There was no difference values between lines (P > 0.10). HFE pigs had greater = 0.03 CP compared with LFE pigs. Based estimated deposition average one week before sampling, calculated digestible lysine content met requirements pig. reduced intake, implying they might have experienced shortage diet. It unclear improved due lysine-shortage differences merit FE.