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Iowa State University

Iowa State University
Picture of Dorian J.Garrick
Dorian J. Garrick
Professor of Animal Science
Jay Lush Endowed Chair in Animal Breeding and Genetics
Iowa State University
225 Kildee
Ames, IA 50011-3250
Phone: 515-294-2080
Fax:     515-294-4850

Doctor of Philosophy, Cornell University, 1988
Bachelor of Agricultural Science (First Class Honors), Massey University, New Zealand, 1981

Dr. Garrick’s current research projects are to improve the accuracy of predicted genetic and phenotypic merit using high-density genomic information. Generally his work focuses on the portfolio of endeavors that are involved in the design, enhancement, implementation and monitoring of genetic improvement programs. These include aspects of genetics, economics, statistics and biology. Attention is directed at variance component estimation, prediction of breeding values, development of breeding objectives, exploitation of breed/heterosis effects and breeding industry structure, primarily in regard to their application to the national improvement of beef cattle, but other species are also considered.

Professional Affiliations
American Dairy Science Association
American Society of Animal Science
Director-at-large, American Society of Animal Science Board
New Zealand Society of Animal Production
Association for the Advancement of Animal Breeding & Genetics

Selected Publications
Strandén, I., and D.J. Garrick. 2009. Technical note: Derivation of equivalent computing algorithms for genomic predictions and reliabilities of animal merit. Accepted J. Dairy Sci. jds-08-1929.R2.

Book Chapter: Cattle. M.D. MacNeil, J.M. Reecy and D.J. Garrick. In: Genome Mapping and Genomics in Domestic Animals. Vol. 3. Edited Noelle Cockett and C. Kole. ISBN: 978-3-540-73834-3. Springer-Verlag, Berlin, Heidelberg, New York. 2009. 280 pp.

Williams, J.L., D.J. Garrick and S.E. Speidel. 2008. Reducing bias in maintenance energy EPD by accounting for selection on weaning and yearling weights. J. Anim. Sci. jas.2008-1442v1-20081442.

Golden, B.L., D.J. Garrick and L.L. Benyshek. 2008. Milestones in beef cattle genetic evaluation. J. Anim. Sci. jas.2008-1430v1-20081430.

Garrick, D.J., and B.L. Golden. 2008. Producing and using genetic evaluations in today’s U.S. beef industry. J. Anim. Sci. jas.2008-1431v1-20081431.

Shirley, K.L., D.W. Beckman and D.J. Garrick. 2008. Inheritance of pulmonary arterial pressure in Angus cattle and its correlation with growth. Journal of Animal Science, 86:815-819.

Van Eenennaam, A.L., R.L. Weaber, D.J. Drake, M.C.T. Penedo, R.L. Quaas, D.J. Garrick and E.J. Pollak. 2007. DNA-based paternity analysis and genetic evaluation in a large, commercial cattle ranch setting. Journal of Animal Science, 85:3159-3169.

Blair, H.T. and D.J. Garrick. 2007. Application of new technologies in sheep breeding. New Zealand Journal of Agricultural Research, 50:85-98.

Speidel, S.E., R.M. Enns and D.J. Garrick. 2007. Weaning weight inheritance in environments classified by maternal weight change. Journal of Animal Science, 85:610-617.

Beckman, D.W., R.M. Enns, S.E. Speidel, B.W. Brigham and D.J. Garrick. 2007. Maternal effects on docility in Limousin cattle. Journal of Animal Science, 85:650-657.

Bryant, J.R., N. Lopez-Villalobos, J.E. Pryce, C.W. Holmes, D.L. Johnson and D.J. Garrick. 2007. Environmental sensitivity in New Zealand dairy cattle. Journal of Dairy Science, 90:1538-1547.

Bryant, J.R., N. Lopez-Villalobos, J.E. Pryce, C.W. Holmes, D.L. Johnson and D.J. Garrick. 2007. Short Communication: Effect of environment on the expression of breed and heterosis effects for production traits. Journal of Dairy Science, 90:1548-1553.

Welsh, C.S., D.J. Garrick, R.M. Enns and G.B. Nicoll. 2006. Threshold model analysis of lamb survivability in Romney sheep. New Zealand Journal of Agricultural Research, 49:411-418.

Dukkipati, V.S.R., H.T. Blair, D.J. Garrick and A. Murray. 2006. ‘Ovar-Mhc’ – Ovine major histocompatibility complex: structure and gene polymorphisms. Genetics and Molecular Research, 5(4):581-608.

Dukkipati, V.S.R., H.T. Blair, D.J. Garrick and A. Murray. 2006. ‘Ovar-Mhc’ – Ovine major histocompatibility complex : role in genetic resistance to diseases. New Zealand Veterinary Journal, 54(4):153-160.

Evans, R.D., M. Wallace, L. Shalloo, D.J. Garrick and P. Dillon. 2006. Financial implications of recent declines in reproduction and survival of Holstein-Friesian cows in spring-calving Irish dairy herds. Agricultural Systems 89:165-183.

Evans, R.D., D.J. Garrick, P. Dillon, D.P. Berry and V. Olori. 2006. Effects of calving age, breed fraction and month of calving on calving interval and survival across parities in Irish spring-calving dairy cows. Livestock Production Science 100:216-230.

Burns, E.M., R.M. Enns and D.J. Garrick. 2006 . The effects of simulated censored data on estimates of heritability of longevity in the thoroughbred racing industry. Genetics and Molecular Research, 5(1):7-15.

Olson, K.M., D.J. Garrick and R.M. Enns. 2006. Predicting breeding values and accuracies from group in comparison to individual observations. Journal of Animal Science, 84:88-92.

Cleveland, M.A., H.D. Blackburn, R.M. Enns and D.J. Garrick. 2005. Changes in inbreeding of US Herefords during the twentieth century. Journal of Animal Science, 83:992-1001.

D.J. Garrick and R.G. Snell. 2005. Emerging technologies for identifying superior dairy cows in New Zealand. New Zealand Veterinary Journal, 53(6):390-399.

Lopez-Villalobos, N. and D.J. Garrick. 2005. Methodology for the design and enhancement of genetic improvement programs illustrated in the context of the New Zealand dairy industry. Agrociencia IX:553-568.

Evans, R.D., T. Grandin, J.M. DeJarnette, M. Deesing and D.J. Garrick. 2005. Phenotypic relationships between hair whorl characteristics and spermatozoal attributes in Holstein bulls. Animal Reproduction Science, 85:95-103.

D.J. Garrick 2005. Genetics: population. Encyclopedia of Animal Science, doi 10.1081/E-EAS-120041456, online only.

D.J. Garrick 2005. Genetics: quantitative. Encyclopedia of Animal Science, doi 10.1081/E-EAS-120019652, online only