Investigates methods to improve accuracy of genetic evaluations of yield traits, type traits, and calving ease, including use of genomic data. Conducts genetic evaluation of dairy goats. Advises on procedures to develop, improve, and access the national database and on distribution of evaluation information.

Investigates genetic differences among dairy cattle for yield, longevity, fertility, and udder health traits. Determines economic values for traits included in Net Merit. Examines effects of inbreeding, crossbreeding, and non-additive genetic merit. Develops statistical methods to improve national and international genetic evaluations and to use genomic data in predictions.

Investigates genetic differences among dairy cattle for calving ease, stillbirth, persistency of yield, and health traits. Develops tools for analyzing genomic data. Studies relationships between genetic markers with large effects and economically important phenotypes. Evaluates changes in genetic diversity in U.S. dairy cattle over time.

Norman, Duane
Retired Geneticist
duane.norman@ars.usda.gov
(301) 504-8660

Coordinates the research effort to improve genetic evaluation of dairy animals, the operation of USDA-DHIA evaluation systems, and policy with industry cooperators. Oversees the maintenance and improvement of the national research database. Conducts research using milk and component yield, fitness, and health traits.

Van Tassell, Curt
Bovine Functional Genomics Laboratory
curt.vantassell@ars.usda.gov
(301) 504-9271

Works between the Bovine Functional Genomics Laboratory and the Animal Improvement Programs Laboratory. Develops and implements methodologies for detection and characterization of quantitative trait loci (QTL) in cattle. Designs, conducts, and evaluates research to improve systems used in the national and international genetic evaluation of dairy cattle. Develops bioinformatic tools to acquire, store, and analyze genomic data.