Desarrollo Embrionario Del Conejo

Beef Sire
Selection Manual
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National Beef Cattle Evaluation Consortium

Mention or display of a trademark, proprietary product, or firm in text or figures does not constitute
an endorsement and does not imply approval to the exclusion of other suitable products or firms.

National Beef CattleEvaluation Consortium
Scientific Council
Dorian Garrick

Executive Director

Iowa State University

Darrh Bullock

University of Kentucky

R. Mark Enns

Colorado State University

Ikhide Imumorin

Cornell University

Ignacy Mistzal

University of Georgia

Steve Kappes
ARS, USDA

Industry Council
Dave Nichols

Charles Hunt

Nichols Farms

Hunt Limousin RanchProducer and Chairman

Producer

Paul Bennett

Mark Thallman

Knoll Crest Farm

U.S. Meat Animal Research
Center

Producer

Tommy Brown
Producer

Sunshine Farms

Jack Cowley
Producer

Cowley Family Ranch

Mike Engler

Producer – Feedlot
Cactus Feeders

Paul Genho

National Cattlemen’s Beef
Association

Farm Management Company

USDA

Alison VanEenennaam
Cooperative Extension

University of California-Davis

Jack Ward

Beef Breeds Council

American Hereford Association

Kevin Yon
Producer

Yon Family Farms

Review Panel
A special “thank you” goes out to the following individuals who reviewed the material included in this publication.
Donald Boggs

Sally Northcutt

Darrh Bullock

John Pollak

Kansas StateUniversity
University of Kentucky

Larry Cundiff

American Angus Association
U.S. Meat Animal Research
Center

U.S. Meat Animal Research
Center

James M. Reecy

Jack Dekkers

Harlan Ritchie

James A. Gosey

Ronnie Silcox

Charlie Hunt

Daryl Strohbehn

David Kirkpatrick

Michael Tess

Don Kress

Mark Thallman

Iowa State University
University of Nebraska-LincolnHunt Limousin
University of Tennessee
Montana State University

Keith Long

4L Grazing, LLC

Mike MacNeil

Fort Keogh Livestock and Range
Research Laboratory

Twig Marston

University of Nebraska-Lincoln

Iowa State University
Michigan State University
University of Georgia
Iowa State University
Montana State University
U.S. Meat Animal Research
Center

Fred ThriftUniversity of Kentucky

Kevin Yon

Yon Family Farms

Contents
Dedication ............................................................................................................................................................8
Foreword...............................................................................................................................................................9
The Importance of Sire Selection ..............................................................................................................10
Dan W. Moser, Kansas State University

Assessing Management, Resources, and Marketing...........................................................................11
Darrh Bullock, University of Kentucky

Genetic Principles...........................................................................................................................................14
Darrh Bullock, University of Kentucky

The Role of Economically Relevant and Indicator Traits..................................................................17
R. Mark Enns, Colorado State University

Data Collection and Interpretation..........................................................................................................21
Jennifer Minick Bormann, Kansas State University

Expected Progeny Differences (EPD).......................................................................................................27
Janice M. Rumph, Pfizer Animal Genetics

Interpretation and Use of Expected Progeny Differences (EPD)...