John F. Hayes

Professor - Animal Genetics

T: 514-398-7804  | john.f.hayes [at] mcgill.ca (Email) |  Macdonald-Stewart Building, MS1-081

Degrees

BSc, MSc (Dublin)
PhD (North Carolina State)

Short Bio

John F. Hayes obtained his PhD degree in 1977 from North Carolina State University, USA, and Bachelor’s (1972) and Master’s (1974) degrees from University College, Dublin, Ireland. Between 1977 and 1979 he performed postdoctoral research at the Institute of Animal Genetics, Department of Animal Genetics, University of Edinburgh, UK.  In 1979 he joined the staff of McGill University as an Assistant Professor in the Department of Animal Science where he was later promoted to Associate Professor (1986) and Full Professor (1994). He served as Assistant Director of the Quebec Dairy Herd Analysis Service (now Valacta) from 1979 to 1985 and as Acting Chair of the Department of Animal Science 1981-1982 and 2002-2003.  Professor Hayes’s main research interests have been focused mostly on the genetics of quantitative traits of economic importance in dairy cattle, particularly milk yield, milk composition, growth, fertility, health, biological efficiency and lifetime performance and profit, and identification of quantitative trait loci (QTLs) for these traits. Professor Hayes’s teaching interests have been in the areas of animal breeding, quantitative and population genetics at the undergraduate level and genetic selection estimation of genetic parameters at the postgraduate level.

Research Interests

Estimation of quantitative genetic parameters of the fatty acid composition and protein composition of milk in the bovine.  Genetic selection for improvement of milk Composition.  Estimation of quantitative genetic parameters and genetic improvement of feed intake and feed efficiency  in Canadian Holsteins. Estimation of quantitative genetic parameters of type traits and their role in prediction and selection for economically important traits in Canadian Holsteins.

Current Research

Estimation of heritabilities of fatty acid percentages in milk fat in Canadian Holsteins . Estimation of genetic and phenotypic correlations among fatty acid percentages in milk fat.  Estimation of genetic correlations of fatty acid percentages with total milk fat and total milk yield. Estimation of heritabilities of and genetic correlations among milk fatty acid unsaturation indices in Canadian Holsteins. Estimation of the effects of parity, age at calving and stage of lactation on fatty acid composition of milk of Canadian Holsteins. Estimation of association of type traits with feed intake, feed efficiency and production traits in Canadian Holsteins.

Courses

AEMA 101 Calculus 1 3 Credits
    Offered in the:
  • Fall
  • Winter
  • Summer


AEMA 102 Calculus 2 4 Credits
    Offered in the:
  • Fall
  • Winter
  • Summer


ANSC 605 Estimation: Genetic Parameters 3 Credits
    Offered in the:
  • Fall
  • Winter
  • Summer


ANSC 606 Selection Index&Animal Imprvmt 3 Credits
    Offered in the:
  • Fall
  • Winter
  • Summer

 

Select Publications

Bilal, G., R. I. Cue and J.F. Hayes. 2016. Genetic and phenotypic associations of type traits and body condition score with dry matter intake, milk yield and number of breedings in first lactation Canadian Holstein cows. Canadian Journal of Animal Science 96: 434-447.

Bilal, G., R. I. Cue, A. F. Mustafa and J. F. Hayes. 2014. Effects of parity, age at calving and stage of lactation on fatty acid composition of milk in Canadian Holsteins. Canadian Journal of Animal Science 94: 401-410.

Bilal, G., R. I. Cue, A. F. Mustafa and J. F. Hayes. 2014. Genetic parameters of individual fatty acids in milk of Canadian Holsteins. Journal of Dairy Science 97:1150-1156.

Bilal, G., R. I. Cue, A. F. Mustafa and J. F. Hayes. 2012. Estimates of heritabilities and genetic correlations among fatty acid unsaturation indices in Canadian Holsteins. Journal of Dairy Science 95: 7367-7371.

Bilal, G., R. I. Cue, A. F. Mustafa and J. F. Hayes. 2012. Genetic relationships among health related fatty acids in milk of Canadian Holsteins. Journal of Dairy Science 95: 226