J. Anim Sci.
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J. Anim Sci. 1969. 29:869-873.
© 1969 American Society of Animal Science
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Wool Production of Western and Dorset X Western Ewes as Influenced by Certain Environmental Factors1

F. A. Thrift2 and J. V. Whiteman

Oklahoma State University3, Stillwater

Abstract

The wool production of 120 purchased Western ewes (predominately Rambouillets) was compared with that of 120 raised Dorset x Western ewes by estimating the influence of certain environmental factors on the wool production of the two breed groups. Records, collected over a 9-yr. period (1957 to 1965), were available on 806 and 780 grease and clean fleece weights for the Western and Dorset x Western ewes, respectively. With respect to grease fleece weight, the Western ewes were superior to the Dorset x Western ewes. On the average, the Western ewes produced 0.96 kg. (P<.001) more grease wool per ewe than did the Dorset x Western ewes. However, the two breed groups produced clean fleece weights that were quite similar. The mean difference of 0.05 kg. of clean fleece in favor of the Western ewes was nonsignificant. Statistical significance of the quadratic effects for ewe weight and ewe condition score was variable for the data from the two breed groups. Year was a significant (P<.01) source of variation influencing the grease and clean fleece weights of the Western and Dorset x Western ewes. Age of ewe was significant (P<.05) for the grease fleece data of the two breed groups but was significant (P<.01) only for the clean fleece data of the Western ewes. The number of lambs born and reared was significant (P<.01) for the grease and clean fleece weights of the Western ewes but was nonsignificant for the Dorset x Western ewes.

Footnotes

1 Journal Article 1768 of the Oklahoma Agricultural Experiment Station, Stillwater.

2 Present address: Department of Animal Science, University of Kentucky, Lexington.

3 Department of Animal Science in cooperation with the AHRD, ARS, U.S.D.A.






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Copyright © 1969 by the American Society of Animal Science.