Putative quantitative trait locus affecting birth weight on bovine chromosome 2

A genome scan for chromosomal re- gions influencing birth weight was performed using 151 progeny of a single Hereford × composite bull and 170 microsatellite markers spanning 2.497 morgans on 29 bovine autosomes. A QTL was identified at the te- lomeric end of bovine chromosome 2 (maximum effect at 114 cM) accounting for approximately 2.8 kg of birth weight or 0.64 residual standard deviations (after ad- justment for sex of calf, age of dam, and breed of dam). No significant effect on growth from birth to weaning was detected in this region. The presence of this QTL