Abstract
A Meta-Regression Analysis to Evaluate the Influence of Branched-Chain Amino Acids in Lactation Diets on Sow and Litter Growth Performance
Highlights
The branched-chain amino acids (BCAA) Ile, Leu, and Val are three dietary essential amino acids for lactating sows necessary for both skeletal muscle and milk protein synthesis
A meta-regression analysis was conducted to evaluate the effects of branched-chain amino acids (BCAA) in lactating sow diets on litter growth performance, sow body weight change, and sow feed intake
Significant predictor variables within three optimum equations developed for litter ADG included the count of weaned pigs per litter, net energy (NE), standardized ileal digestible (SID) Lys, crude protein (CP), sow ADFI, Val:Lys, Ile:Lys, and Leu:Val
Summary
The branched-chain amino acids (BCAA) Ile, Leu, and Val are three dietary essential amino acids for lactating sows necessary for both skeletal muscle and milk protein synthesis. Under dietary conditions of high Leu, increased catabolism of the other BCAA (Val and Ile) may occur. Common lactation diets that include corn and corn co-products often contain high levels of Leu, which may decrease the utilization of Ile and Val. We hypothesized that the differences in lactating sow performance in response to BCAA concentrations, especially Val, might be due to interactions with high Leu concentrations. The objective of this regression analysis was to summarize studies evaluating the effects of BCAA in lactation diets and develop a statistical model to predict the influence of the interrelationships of BCAA on sow and litter growth performance
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