Genome-wide association study for mid-infrared methane predictions in Walloon dairy cows

peer reviewed ; This study aimed to identify genomic regions associated with two mid infrared-based CH4 traits [predicted daily CH4 emission (PME, g/d), and log-transformed predicted CH4 intensity (LMI)] in Walloon dairy cows. The data consisted of 1,529,282 test-day records from 229,465 cows distributed in 1,530 herds collected from 2006 to 2021. Random regression test-day models were used to estimate variance components. The proportion of genetic variance explained by windows of 50 consecutive SNPs was calculated and regions accounting for at least 1.0% of the total genetic variance were ide... Mehr ...