Genetic parameters for methane emission traits in Australian dairy cows
CM Richardson, TTT Nguyen, M Abdelsayed, PJ Moate, SRO Williams, TCS Chud, FS Schenkel, ME Goddard, I van den Berg, BG Cocks, LC Marett, WJ Wales, JE Pryce
Journal of Dairy Science | ELSEVIER SCIENCE INC | Published : 2021
Methane is a greenhouse gas of high interest to the dairy industry, with 57% of Australia's dairy emissions attributed to enteric methane. Enteric methane emissions also constitute a loss of approximately 6.5% of ingested energy. Genetic selection offers a unique mitigation strategy to decrease the methane emissions of dairy cattle, while simultaneously improving their energy efficiency. Breeding objectives should focus on improving the overall sustainability of dairy cattle by reducing methane emissions without negatively affecting important economic traits. Common definitions for methane production, methane yield, and methane intensity are widely accepted, but there is not yet consensus fo..View full abstract
We thank DairyBio, jointly funded by Dairy Australia (Melbourne, Australia), The Gardiner Foundation (Melbourne, Australia), and Agriculture Victoria (Melbourne, Australia), for funding this project and C. M. Richardson's PhD project. The authors also thank the staff at Ellinbank SmartFarm (Ellinbank, Australia) for their technical expertise and assistance. The authors have not stated any conflicts of interest.