...From the pages of Agricultural Research magazine
No Wool? No Problem!
Sheep that produce hair
(like this Dorper ram, in
the foreground) instead of
wool don't need shearing,
an expensive, labor-intensive
process. Elimination of
shearing may increase profits
for producers interested in
producing meat rather than
wool. Behind the Dorper ram
in the photo is a Romanov ewe.
A thick coat of wool is one of the most recognizable features
of sheep. Even when seeing a sheep that has been recently sheared, we
know that the wool will soon reappear. But what if there were sheep
that had no wool at allbut instead, hair that is similar to humans'?
Believe it or not, there are a few breeds of sheep raised
in the United States that have just that. Some of these breeds have
been around for more than 50 years. Now Agricultural
Research Service scientists are determining through genetics which
breeds should be mated to produce "easy-care" sheep. Work
on this sheep breeding project began in 2000 and is led by geneticist
Kreg A. Leymaster of the Roman L. Hruska U.S. Meat Animal Research Center
(MARC) in Clay Center, Nebraska.
According to Leymaster, the price of wool has been going
down. Consequently, the cost of shearing a sheep sometimes exceeds the
price at which the wool can be sold. On the other hand, demand for the
meat of sheepespecially within certain ethnic groupsis increasing
dramatically, and U.S. producers cannot keep up. Many of the chops and
other lamb cuts in our markets actually come from Australia and New
Zealand. ARS is conducting research to help U.S. ranchers become more
competitive in selling sheep for food.
"The U.S. sheep industry encouraged evaluation of
hair breeds as a possible means to increase profits for ranchers,"
Leymaster says. So now he is investigating which combination of sheepusing
both wool and hair breedswould be best for farmers and consumers
alike. Sheep with hair don't need to be sheared, and that means lower
Leymaster bred rams of four breeds. He used two hair breeds
(Katahdin, which was developed in the 1950s in Maine; and Dorper, which
was brought to the United States from South Africa 7 years ago) and
two wool breeds (Rambouillet and Dorset). He mated the four breeds to
360 Romanov ewes in 2000, 2001, and 2002. Romanov sheep are known for
their early sexual maturity, and they produce more lambs than other
breeds. Leymaster is trying to find the combination of breeds that can
produce meat most efficiently.
This study is the first to directly compare the two hair
breeds, and there is only limited information on hair breeds in general,
Leymaster says. Both Dorper and Rambouillet have evolved under extensively
dry conditions, while Dorset and Katahdin have been bred in more favorable
The research should help U.S. ranchers find the most profitable
and efficient breed of sheep for their farm type. Leymaster hopes to
evaluate 300 crossbred ewes of each breed through the 3 years of mating.By
David Elstein, Agricultural
Research Service Information Staff.
This research is part of Food Animal Production, an
ARS National Program (#101) described on the World Wide Web at www.nps.ars.usda.gov.
"No Wool? No Problem!" was published in the April 2003 issue of Agricultural Research magazine.