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Creator:: Dahmen, J. J. (Jerome John), 1919-
Abstract:: Eight purebred rams (four Suffolk and four Panama) previously selected as high and low on the basis of post-weaning performance feed test of 84 days were used each of three years. Each of the rams was mated to approximately 25 grade Panama ewes each year. One ram and 25 ewes...
Resource Type:: Dissertation
Full Text:: produce these in quantity and quality have economic value in breeding for sheep im- provement. Weaning

Creator:: Reeves, Jerry John
Abstract:: Twenty-eight Columbia ewes were made available for study during their breeding and anestrous seasons. After the regularity of the estrous cycles had been established, eight of the ewes were sacrificed in pairs at four different stages of the estrous cycle. Eight additional ewes were sacrificed during anestrus. Pituitary glands, ovaries,...
Resource Type:: Masters Thesis
Full Text:: approximately the midpoint of the breeding season for the ewe. The domestic sheep is a seasonally

Creator:: Levine, Joel Martin
Resource Type:: Masters Thesis
Full Text:: . Ewe Production and Lamb Traits II. Simulation of the Sheep Flock: Net Income Per Ewe AN ABSTRACT OF

Creator:: Osland, Robert Birger
Abstract:: Five experiments were conducted to study the activity of the pituitary gland in sheep as influenced by estrogen administered alone or in combination with progesterone. Particular emphasis was given to the study of gonadotropic activity. Mature wethers (experiments I, III, IV and V) or ewes (experiment II) were utilized as...
Resource Type:: Masters Thesis
Full Text:: study the activity of the pituitary gland in sheep as influenced by estrogen administered alone or in

Creator:: Collins, Debora Ann
Abstract:: This study examined the effects of sire breed and weight on the performance of 117 crossbred wether lambs born at the Oregon State University Agricultural Experiment Station, Corvallis. Lambs were produced by mating Clun Forest,Polypay, Dorset, Border Leicester, and Suffolk sires to Columbia-type ewes. After weaning at approximately 90 days...
Resource Type:: Masters Thesis
Full Text:: review of sheep crossbreeding studies by Nitter (1978) indicated that crossbreeding systems generally

Creator:: Nawaz, Mohammad, 1957-
Abstract:: Coopworth sheep, a newly available genotype, were compared with other genotypes in two trials to assess cumulative lamb and wool production and contributing components related to survival, reproduction and growth, and for the effects of ewe body weight on reproductive traits. In a third trial, various genotypes generated in the...
Resource Type:: Dissertation
Full Text:: approved: Howard IV Meyer Coopworth sheep, a newly available genotype, were compared with other

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:: : ____________________________________ Howard H. Meyer During years 2005, 2006, and 2007 ewes of predominantly Polypay breeding were

Creator:: Hunt, William Lynn
Abstract:: The first study utilized ova transfer in sheep and involved hormonal treatments for synchronization of estrus and superovulation in an investigation of crossbred maternal influences on inbred and linecross lambs. Synchronization of estrus in ewes was achieved effectively with either oral progestogen, 6 α-methyl-17α-hydroxy-progesterone acetate (60 mg./ewe/day), or intramuscular injections...
Resource Type:: Dissertation
Full Text:: has not been accepted for any large scale breeding prograrn, although an atternpt with sheep in

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