tendency toward significanceP = 0.054
Although the LBL and QBL models were not significant, they showed a tendency toward significance and relatively high R 2 values, and, the estimated ideal ratios of SID Arg to SID Lys for BWG in 10- to 21-day-old broilers based on LBL and QBL were 107.7% (P = 0.054, R 2 = 0.946) and 116.7% (P = 0.059, R 2 = 0.941), respectively.