Dairy Genetics Trend in Genomic Versus Proven Sire Usage By Tanya Eadie - June 14, 2023 472 FacebookTwitterPinterestWhatsAppLinkedinReddItEmailPrintTumblrTelegramMixVKDiggLINEViber Source: Lactanet by: Hannah Sweett, Ph. D. and Brian Van Doormaal Each year, Lactanet updates the young sire market share and the trend in the use of genomic young bulls versus proven sires for Holstein, Jersey, Ayrshire, and Brown Swiss. See the plots below for a 2022 update.