Page 30 - Effertz Key Ranch 39th Annual Charolais Bull Sale
P. 30
WHY DO WE LEPTIN TEST OUR BULLS?
Dr. Eric DeVuyst, OSU
Ag Economist wrote in
an Oklahoma Extension
Service circular Th e Eco-
nomics of Gene Test-
ing…
Genotype (TT) fed cattle
are more profi table than lean genotype (CC) cattle. Diff erences in profi t range from $14 to $60 per head.
Th e same mutation has been investigated in milk produc¬tion and beef calf weaning weight. DeVuyst et al. (2008)
also report heavier calf wean¬ing weights for TT and CT cows. Th e eff ect was signifi cant in crossbred cows. TT cows
wean heavier calves than CC cows. Cross¬bred TT cows wean calves weighing 27 pounds more than calves weaned
from crossbred CC cows.
Th eir analysis found that TT and CT cows were more profi table than CC cows due to 1) higher calf weaning weights
and 2) longer productive lives. Diff erences in profi tability ranged from $15 to $39 per year depending on breed.
28 *Yearling weights, fi nal performance, profi t index and scrotal measurement will be available at www.effertzkeyranch.com.
