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Post-weaning growth performance of heifers grazing Tasmanian native pastures and the estimation of inbreeding levels using random amplified polymorphic DNA markers. A. E. O. Malau-Aduli*1 and M. Dunbabin2, 1University of Tasmania, Hobart, Tasmania, Australia, 2'Bangor', Dunalley, Tasmania, Australia.

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401

Influence of breed on postpartum interval and estrous cycle length in beef cattle. R. A. Cushman*, M. F. Allan, R. M. Thallman, and L. V. Cundiff, USDA, ARS, Roman L. Hruska U.S. Meat Animal Research Center, Clay Center, NE.

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402

Effect of an artificial sweetener and yeast product combination on immune function measurements, growth performance, and carcass characteristics of beef heifers. R. R. Reuter*1,2, J. A. Carroll2, M. S. Brown3, N. E. Forsberg4, Y.-Q. Wang4, R. Mock5, J. D. Chapman6, and M. L. Galyean1, 1Texas Tech University, Lubbock, 2USDA-ARS Livestock Issues Research Unit, Lubbock, TX, 3West Texas A&M University, Canyon, 4Oregon State University, Corvallis, 5Texas Veterinary Medical Diagnostic Laboratories, Amarillo, TX, 6Prince Agri-Products, Quincy, IL.

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403

Evaluation of the effects of two commercially available modified live vaccines for bovine respiratory disease complex on naïve beef steers. W. J. Horne*1, K. S. Barling2, A. D. Herring1, D. K. Lunt1,3, A. Thomas2, and J. E. Sawyer1, 1Texas A&M University Department of Animal Science, College Station, TX, 2Novartis Animal Health US, Inc, Larchwood, IA, 3McGregor Agricultural Research Center, McGregor, TX.

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Management factors affecting selling prices of Arkansas beef calves: 2000 vs. 2005. B. L. Barham and T. R. Troxel*, University of Arkansas Cooperative Extension Service, Little Rock, AR.

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Impact of the phenotypic expression of calf genetics on the selling price of calves sold in Arkansas livestock markets: 2000 vs. 2005. B. L. Barham* and T. R. Troxel, University of Arkansas Cooperative Extension Service, Little Rock, AR.

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406

Carcass trait characterization of retained and purchased Alabama feeder calves. S. V. Free*, W. C. Rutherford, J. B. Elmore, G. S. Hecht, and L. A. Kriese-Anderson, Auburn University, Auburn, AL.

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407

Carcass trait characterization of Alabama feeder calves fed in two regions of the United States. W. C. Rutherford*, S. V. Free, J. B. Elmore, G. S. Hecht, and L. A. Kriese-Anderson, Auburn University, Auburn, AL.

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408

Comparison of carcass trends of Alabama cattle with national quality audit reports. J. B. Elmore*, L. A. Kriese-Anderson, W. C. Rutherford, S. V. Free, G. S. Hecht, and W. F. Owsley, Auburn University, Auburn, AL.

Beef Species I Chair: Don Franke, Louisiana State University 212

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Using epidemiological models and genetic selection to identify theoretical opportunities to reduce disease impact. G. D. Snowder*, USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE.

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Assessment of different selective phenotyping design strategies for genetical genomics studies with outbred F2 populations. F. F. Cardoso*1,2, J. P. Steibel1, G. J. M. Rosa3, C. W. Ernst1, R. O. Bates1, and R. J. Tempelman1, 1Michigan State University, East Lansing, 2Embrapa Pecuária Sul, Bagé, RS, Brazil, 3University of Wisconsin, Madison.

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Different methods of selecting animals for genotyping to maximize the amount of genetic information known in the population. M. L. Spangler*1, R. L. Sapp2, J. K. Bertrand1, M. D. MacNeil2, and R. Rekaya1, 1University of Georgia, Athens, 2USDA-ARS Fort Keogh Livestock and Range Research Laboratory, Miles City, MT.

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Effect of raw data normalisation on detection of differentially expressed genes in cDNA microarray experiments. C. Dimauro, N. P. P. Macciotta*, and A. Cappio-Borlino, Dipartimento di Scienze Zootecniche, Università di Sassari, Sassari, Italia.

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413

Methods to explain genomic estimates of breeding value. P. M. VanRaden and M. E. Tooker*, Animal Improvement Programs Laboratory, USDA, Beltsville, MD.

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Efficient estimation of breeding values from dense genomic data. P. M. VanRaden*, Animal Improvement Programs Laboratory, USDA, Beltsville, MD.

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Recursive algorithm to compute inbreeding coefficients assuming non-zero inbreeding of unknown parents. I. Aguilar* and

Breeding and Genetics - Livestock and Poultry Analyses and Methods I Chair: Eugenia Cienfuegos-Rivas, Universidad Autonoma de Tamaulipas 210

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