Dr. Jack Dekkers

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

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
Ph.D., Animal Breeding, Universty of Wisconsin, 1989
M.S., Animal Science, Agricultural University, Wageningen, 1985
B.S., Animal Science, Agricultural University, Wageningen, 1982
806 Stange Road, 239D Kildee Hall