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Filtering by: Subject Sheep breeds -- Oregon -- Testing

Comparison of Dorper and Polypay as maternalsire breeds for reduced input lamb production

Creator:

Haas, Joel D.

Abstract:

During years 2005, 2006, and 2007 ewes of predominantly Polypay breeding were bred to either Dorper or Polypay rams for spring lambing. Ewes were assigned to single-sire mating groups based on age and genotype. Internally generated replacements were added to the flock for the 2007 lambing season and bred to...

Resource Type:

Masters Thesis

Full Text:

Dorper: An Alternative Ewe Breed An interest in hair sheep has developed in western Oregon due to
Response of genetically different groups of sheep to hill pasture conditions

Creator:

Johnston, Elbert Felton

Resource Type:

Dissertation

Full Text:

Mtny factors affect the value of a breed of sheep for a given area. In Westoni Oregon one of these
Effects of genotype, nutrition, and progesterone on uterine efficiency in the ewe

Creator:

Fackrell, Bronwyn B.

Abstract:

Embryonic loss of potential lambs resulting in partial failure of multiple ovulations is a significant factor in the reproductive rate of prolific breeds. The roles of genetic and nutritional variation (and their possible interaction) on embryonic loss were studied by mating blackface and whiteface ewes of either high or low...

Resource Type:

Masters Thesis

Full Text:

mortality in sheep: a review. Anim. Breed. Abstr. 37:173-190. Edey, T. N. 1972. Fertility at the first