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ARS Home » Plains Area » Clay Center, Nebraska » U.S. Meat Animal Research Center » Genetics and Animal Breeding » Research » Publications at this Location » Publication #329706

Title: Across-breed EPD tables for the year 2016 adjusted to breed differences for birth year of 2014

item Kuehn, Larry
item Thallman, Richard - Mark

Submitted to: Beef Improvement Federation Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 6/3/2016
Publication Date: 6/14/2016
Citation: Kuehn, L.A., Thallman, R.M. 2016. Across-breed EPD tables for the year 2016 adjusted to breed differences for birth year of 2014. In proceedings: 2016 Beef Improvement Federation Annual Meeting & Symposium. Manhattan, KS, June 14-17, 2016. pp. 127-153.

Interpretive Summary:

Technical Abstract: Records of progeny of 18 breeds were used to estimate differences among the breeds for birth, weaning, and yearling weight and for maternal effects of weaning weight, among 15 of the 18 breeds for carcass marbling and ribeye area and among 14 of the 18 breeds for fat depth and carcass weight. The records were also used to estimate regression coefficients of progeny performance on breed association EPD. The regression coefficients represent the proportion of the differences in sire EPD that were exhibited in the progeny at USMARC and are used to adjust the breed differences estimated from USMARC data to the differences between animals in the breed born in 2014 (based on the 2014 breed average EPD). Using these adjusted breed differences, adjustment factors were calculated that can be added to breed association EPD to allow comparison of bulls from the 18 breeds (Angus, Beefmaster, Brahman, Brangus, Braunvieh, Charolais, Chiangus, Gelbvieh, Hereford, Limousin, Maine-Anjou, Red Angus, Salers, Santa Gertrudis, Shorthorn, Simmental, South Devon, and Tarentaise). This report details the calculations used for the annual update of the procedure first implemented in 1991. Changes for 2015 included additional progeny and grandprogeny weights and carcass records on all 18 breeds.