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Crossbred Ewes Compared with Ewes of Parent Breeds for Wool and Lamb Production¹

University of Wyoming, Laramie

Abstract

MATING of black-faced rams to whitefaced, wool-type ewes has been commonly practiced for many years in the western range area. However. the crossbred ewe lambs have usually been sent to market along with wether lambs, and little or no information is available on the subsequent production of these crossbred lambs. According to Terrill (1958) it is generally recognized by sheepmen that crossbreeding results in increased fertility and growth rate of lambs.

Sidwell et al. (1962, 1964) reported increased fertility, prolificacy, lamb livability, and lamb weights of two-, three-, or four-breed crosses as compared with purebred averages. but no data on wool production were included. Reports by Hultz et al. (1935) and Neale (1943) indicated that wool production of cross-bred ewes sired by Hampshire or Southdown rams was below that of either whitefaced range ewes or crossbred ewes sired by Lincoln, Romney or Corriedale rams. Lasley (1963) summarized the average increase in various traits realized from crossbreeding sheep.

¹ Published with approval of the Director, Wyoming Agricultural Experiment Station, as Journal Paper No. 253.