Research Topics
| J B ColeSummaryAffiliation: Agricultural Research Service Country: USA Publications
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Detail Information
Publications
Use of haplotypes to estimate Mendelian sampling effects and selection limitsJ B Cole
Animal Improvement Programs Laboratory, ARS, USDA, Beltsville, MD 20705 2350, USA
J Anim Breed Genet 128:446-55. 2011..Selection on functions of MS could be used to change variances in later generations...- Breeding and Genetics Symposium: really big data: processing and analysis of very large data setsJ B Cole
Animal Improvement Programs Laboratory, ARS, USDA, Beltsville, MD 20705 2350, USA
J Anim Sci 90:723-33. 2012..The ultimate value of these systems is to decrease time-to-results in research, increase accuracy in genomic evaluations, and accelerate rates of genetic improvement... - Genome-wide association analysis of thirty one production, health, reproduction and body conformation traits in contemporary U.S. Holstein cowsJohn B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, Maryland, USA
BMC Genomics 12:408. 2011..Here, we report results of a genome-wide analysis of predicted transmitting ability (PTA) of 31 production, health, reproduction and body conformation traits in contemporary Holstein cows... - Short communication: best prediction of 305-day lactation yields with regional and seasonal effectsJ B Cole
Animal Improvement Programs Laboratory, ARS, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 94:1601-4. 2011..Correlations of yields for 50-d intervals with those using all TD were similar across analyses. Yields for RIP were slightly more accurate when adjusted for regional and seasonal differences... - Visualization of results from genomic evaluationsJ B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 93:2727-40. 2010..These graphics are easily produced automatically and added to online query systems, providing users with novel information at little cost... - Distribution and location of genetic effects for dairy traitsJ B Cole
Animal Improvement Programs Laboratory, ARS, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 92:2931-46. 2009..Results validate quantitative genetic assumptions that most traits are due to the contributions of a large number of genes of small additive effect, rather than support the finite locus model... - Genetic evaluation of lactation persistency for five breeds of dairy cattleJ B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 92:2248-58. 2009..Routine genetic evaluations for lactation persistency, as well as the development of prediction equations for several lactation end-points, may provide producers with tools to better manage their herds... - Best prediction of yields for long lactationsJ B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 92:1796-810. 2009..Many cows can profitably produce for >305 DIM, and the revised program provides a flexible tool to model these records... - Genetic evaluations for mixed-breed populationsP M Vanraden
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 90:2434-41. 2007..More research and education may be needed on using the new evaluations in the design of breeding programs. Implementation is expected in May 2007... - Stillbirth (co)variance components for a sire-maternal grandsire threshold model and development of a calving ability index for sire selectionJ B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 90:2489-96. 2007..02 (0.16). A calving ability index combining stillbirth (SB) and calving ease (CE) was developed for inclusion in the Lifetime Net Merit index. The index was calculated as -4(sire CE)-3(daughter CE)-4(sire SB) -8(daughter SB)... - Genetic evaluation and best prediction of lactation persistencyJ B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 89:2722-8. 2006..Routine genetic evaluations for persistency are feasible and may allow for improved predictions of yield traits. As calving intervals increase, persistency may have greater value... - Technical note: adjustment of traditional cow evaluations to improve accuracy of genomic predictionsG R Wiggans
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 94:6188-93. 2011..9 percentage points for Jerseys when the predictor population was adjusted. The accuracy of genomic evaluations for Holsteins and Jerseys was increased through better use of information from cows... - Genomic inbreeding and relationships among Holsteins, Jerseys, and Brown SwissP M Vanraden
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 94:5673-82. 2011..Pedigree relationship matrices ignore common ancestry shared by base animals within breed and may not approximate genomic relationships well in multibreed populations... - Genetic and environmental factors that affect gestation length in dairy cattleH D Norman
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 92:2259-69. 2009..However, intentional selection for either shorter or longer GL is not recommended without consideration of its possible effect on other dependent traits (e.g., calving ease and stillbirth)... - Impact of genetic merit for milk somatic cell score of sires and maternal grandsires on herd life of their daughtersR H Miller
Animal Improvement Programs Laboratory, ARS, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 92:2224-8. 2009.... - Multiparity evaluation of calving ease and stillbirth with separate genetic effects by parityG R Wiggans
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 91:3173-8. 2008..Accuracy of the net merit index can be improved by adjusting weights to use evaluations for separate parities optimally... - Genetic evaluation of stillbirth in United States Holsteins using a sire-maternal grandsire threshold modelJ B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 90:2480-8. 2007..There was no evidence of a genetic trend for either trait. More complete recording of stillbirth scores would improve reliabilities and could allow for evaluations of other breeds... - Genetic evaluation of calving ease for Brown Swiss and Jersey bulls from purebred and crossbred calvingsJ B Cole
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 88:1529-39. 2005..Correlations among solutions and evaluations showed HO evaluations were not adversely affected by BS data and BS sires were reranked as compared with the BS-only evaluation...