THE RELATIONSHIP BETWEEN PROGENY PERFORMANCE AND SIRE EXPECTED PROGENY DIFFERENCES FOR CENTRAL TEST POSTWEANING GAIN

On-farm records (84770) were available to evaluate the relationship between BW and WW with sires' expected progeny difference for central test postweaning gain, both within (EPD) and across (ABC) breeds. Regression coefficients for BW and WW on sire ABC were 0.03 +/- 0.01 and 0.25 +/- 0.05, respectively. For EPDs, coefficients for BW and WW were either positive (P < 0.05) or not different from zero (P < 0.13) for all breeds. Young sire selection based on central test postweaning gain ABC can be used to change progeny BW and WW.