To increase quantity/biological efficiency levels is not enough anymore at present Brazilian beef cattle breeding scenario: the challenge is to continue to do that and, at the same time, genetically improve beef quality. Worldwide, beef is losing market shares in part due to lack of quality consistency. EPDs have helped us to increase arithmetic averages but what we need now is a statistic that can rank sires according to levels of progeny compliance to market windows and to accrue quality bonuses. A way to do that is to couple EPDs with reliable measures of dispersion/consistency. Here, two of such estimators are presented. Penalizing EPDs according to progeny mean absolute deviation can separate seemingly equally superior sires into groups with: more uniform quality progeny vs. higher proportion of non-conforming progeny.

L. A Fries, F. V Brito, V. Cardoso, R. Carvalheiro, C. D Ortiz-Pena, M. L Piccoli, S. A de Queiroz, V. M Roso, Flavio S Schenkel, J. LP Severo

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 24.23, 2006
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