Some of these traits include:
Historically, breed and herd improvement has been achieved through visual inspection and choosing animals based on phenotype. Producers have been selecting for genetic variants associated with performance traits, albeit with less accuracy and precision than current technology provides. Genetic testing identifies the variants associated with performance and quality traits allowing producers to accurately and precisely select desirable traits.
Leptin is a hormone that regulates feed intake, energy expenditure and whole body energy balance. A SNP in the Leptin gene has been associated with several economically important traits including milk production, weaning weight, backfat, marbling, quality grade, yield grade, dry matter intake, and days on feed. There are 3 Leptin variants: