Gerlad Q. Fitch, Extension Sheep Specialist, Oklahoma State University
(Previously published by Oklahoma State University Extension: March, 2017)
Why do commercial producers crossbreed sheep-or any animal, for that matter? There are two reasons. First, no breed of sheep is best in all characteristics. If a producer combines the best characteristics of several different breeds, they have a chance to get a better combination than he could get with any one breed. This is called breed complementarity.
As an example of this, the Finnish Landrace sheep are extremely early maturing and have a very high lambing rate. They do, however, have relatively poor conformation, and the wool is of poor quality. Rambouillet sheep, on the other hand, produce excellent wool, but they do not have a high lambing rate and they are slow maturing. Neither of these two breeds excels in growth rate and carcass conformation. The meat breeds are also used to sire market lambs because they are growthier and produce excellent carcasses. The meat breeds are not well adapted to many conditions under which sheep are raised, however.
Another reason for crossbreeding is that Continue reading