Dr. Jack Dekkers

People
C.F. Curtiss Distinguished Professor
Section Leader of Animal Breeding and Genetics
Photo of Jack Dekkers
Department: 

Research Emphasis

Quantitative and statistical genetics, including the integration of quantitative and molecular genetics and genomics for QTL mapping, genome-wide association studies, and genomic prediction and selection; design and economic aspects of breeding programs for livestock.

Research Contributions

  • Methods for economic evaluation of breeding programs in competitive markets
  • Methods for simulation of breeding programs that combine stochastic and deterministic models
  • Design and evaluation of dairy breeding programs to capitalise on reproductive technologies
  • Analytical methods to derive asymptotic responses to selection on BLUP breeding values that account for the effects of selection on genetic variance
  • Effects associated with genetic markers under the infinitesimal genetic model
  • Genetic analysis and national genetic evaluation systems for somatic cell score, longevity, and dystocia for dairy cattle.
  • Derivation of economic values and development of total economic index for dairy bulls in Canada
  • Use of random regression models for analysis of test-day data
  • Optimal selection on non-linear profit functions over multiple generations through the use of optimal control theory
  • Marker-assisted selection and optimal selection to resolve the conflict between short- versus long-term responses with marker-assisted selection
  • Statistical methods for QTL mapping and their application to detect genes and QTL in pigs.
  • Evaluation of measures of linkage disequilibrium
  • Comparison of methods for linkage disequilibrium analysis
  • Use of high-density SNP genotyping for genomic selection, including improvement of crossbred performance
  • Implementation of genomic selection using low-density SNP panels
  • Experimental evaluation of genomic selection in layer chickens
  • Selection index methods for evaluation of marker-assisted and genomic selection
  • Genetic and biological aspects of residual feed intake in pigs; development of RFI research consortium.
  • Genome-wide association study for host response to PRRS in pigs; Discovery of major QTL on chromosome 4.
  • Identification of Severe Combined Immuno-Deficiency (SCID) in pigs and development of SCID pigs for biomedical research.
Area of Expertise: 
Quantitative Genetics and Genomics
Education: 
Ph.D., Animal Breeding, Universty of Wisconsin, 1989
M.S., Animal Science, Agricultural University, Wageningen, 1985
B.S., Animal Science, Agricultural University, Wageningen, 1982
Contact
515-294-7509
806 Stange Road, 239D Kildee Hall
Ames
Iowa
50011-3150