The University of Guelph and Canadian Milk Control Organizations have developed a breeding value to help dairy farmers reduce methane emissions from their herds. The research, based on data from 500 cows and 700,000 milk mid-infrared spectroscopy data from first lactation dairy cows, will be published by Lactanet in April. This tool, which is 70% reliable for genomic bulls, is expected to reduce emissions by 20-30% by 2050 through genetic selection. The methane index will also be provided to Semex customers who have had their animals genotyped. Currently, the breeding value is only available for Holsteiners, but plans are underway to extend it to other breeds like the Jersey.