[1] Univ Alberta, Dept Agr Food & Nutr Sci, Livestock Gentec, Edmonton, AB, Canada
[2] Alberta Agr & Forestry, Lacombe Res Ctr, Lacombe, AB, Canada
[3] Canadian Dairy Network, Guelph, ON, Canada
[4] Univ Guelph, Dept Anim Biosci, Ctr Genet Improvement Livestock, Guelph, ON, Canada