Submitted to: Journal of Animal Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: February 4, 2004
Publication Date: May 1, 2004
Citation: Casas, E., Freking, B.A., Leymaster, K.A. 2004. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: II. Reproduction of F1 ewes in fall mating seasons. Journal Of Animal Science. 82:1280-1289. Interpretive Summary: Differences among breeds of sheep in productivity of economically important traits are genetically based and can be exploited through the use of crossbreeding systems. The comparison of F1 ewes from five different sire breeds provides information to help producers identify breeds that meet specific production requirements. Superior productivity of Romanov-sired ewes was due to greater conception rate and prolificacy at each mating season and ewe age, as well as greater longevity, relative to ewes by Finnsheep, Texel, Dorset, and Montadale sires. Broader use of crossbred ewes incorporating Romanov germplasm would greatly increase the efficiency of commercial sheep production.