The phrase "trait locus" refers to a specific location on a person's genetic material (genes) that is related to a particular trait or characteristic they possess. Full definition
LG / J mice are often compared to SM / J (Stock No. 000687) for quantitative trait locus analysis in the areas of atherosclerosis, obesity, and mandible size. (jax.org)
Quantitative trait locus analysis of candidate gene alleles associated with attention deficit hyperactivity disorder (ADHD) in five genes: DRD4, DAT1, DRD5, SNAP - 25, and 5HT1B (link.springer.com)
Bentolila, S., Babina, A. M., Germain, A., and Hanson, M. R. (2013) Quantitative trait locus mapping identifies REME2, a PPR - DYW protein required for editing of specific C targets in Arabidopsis mitochondria. (hansonlab.org)