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Relationships between hemoglobin genotype and production in cross-bred ewes. I. Reproduction and lamb production : II. Wool and milk production and health related traits

Creator:: Dally, Martin R.
Abstract:: I. REPRODUCTION AND LAMB PRODUCTION Relationships among hemoglobin (Hb) genotypes and reproduction and production traits were examined in 294 four- and five-year-old North Country Cheviot, Dorset, Finnsheep or Romney x Suffolk or Columbia-type crossbred ewes. Hb BB ewe lambs were youngest at first estrus and Hb AA ewe lambs were...
Resource Type:: Masters Thesis
Full Text:: Romney x Suffolk or Columbia-type crossbred ewes. Hb BB ewe lambs were youngest at first estrus and Hb

Perinatal mortality and preweaning growth of progeny of ewe lambs

Creator:: Gendron, Eric
Abstract:: Half Polypay ewe lambs were bred to Suffolk, North Country Cheviot and Hampshire rams to lamb at about one year of age. Type of birth-rearing significantly affected mortality by 70 days of age and all weights of lambs from birth to weaning. The mortality rate at 70 days of age...
Resource Type:: Masters Thesis
Full Text:: ewe lambs AN ABSTRACT OF THESIS OF Eric P. Gendron for the degree of Master of Science in Animal

Breed and heterosis effects on wool and lamb production of rotationally crossed ewes

Creator:: Gallivan, Catherine Agnes
Abstract:: One thousand twenty-three lambing records of 351 ewes bred in a rotational crossbreeding system involving Columbia or Targhee, Hampshire and Finnish Landrace breeds were examined. A regression approach was used to determine the effects of breeds and heterosis on wool grade, greasy fleece weight, ewe weight at lambing, lambing date,...
Resource Type:: Masters Thesis
Full Text:: was used to determine the effects of breeds and heterosis on wool grade, greasy fleece weight, ewe

Some effects of estradiol on ovine luteal function

Creator:: Akbar, Abulfatah Maqsood, 1938-
Abstract:: Some effects of 171β-estradiol on ovine luteal function were studied in five experiments. Estradiol injected into ewes on days 11 and 12 of the estrous cycle caused luteal regression in both intact and unilaterally hysterectomized ewes indicating that the presence of one uterine horn permits estradiol to cause luteolysis comparable...
Resource Type:: Dissertation
Full Text:: , respectively. Serum of blood samples drawn from the jugular vein of each ewe over a two day period beginning

In Vivo and In Vitro effects of a cyclopropenoid fatty acid on progesterone synthesis by the ovine corpus luteum

Creator:: Tumbelaka, Ligaya
Abstract:: Two experiments were conducted to examine the effect of a cyclopropenoid fatty acid on luteal cell function. In Exp. 1, 12 mature ewes were mated to a fertile ram, assigned to two groups (n = 6/group) and laparotomized on day 18 of gestation. Ewes with corpora lutea (CL) in both...
Resource Type:: Masters Thesis
Full Text:: (Scott et al., 1968) and ewe (Waterman, 1980,1988) luteal tissue are palmitic (16:0), stearic (18:0

Effects of body condition and pre-lambing supplementation on ewe productivity

Creator:: Khan, Khalidullah
Abstract:: A series of trials was conducted with Polypay (P), Coopworth (CP), Hampshire (H), and crossbred ewes over a two year period at three locations to assess the effects of ewe body condition and pre-lambing supplementation on ewe productivity. Supplementation trials were conducted at all three locations in Year 1 using...
Resource Type:: Masters Thesis
Full Text:: on ewe productivity AN ABSTRACT OF THE THESIS OF Khalidullah Khan for the degree of Masters of

Effects of differential ewe body condition at mating and early post-mating nutrition on embryo survival

Creator:: West, Kathryn S.
Abstract:: Two trials were conducted over consecutive years to examine the effects of ewe body condition and post-mating nutrition on ovulation rates and embryo survival. Trial 1 used 146 Polypay ewes ranging in age from 5 to 8 years in a 3 x 2 factorial array of pre-mating (high-H, low flushed-LF...
Resource Type:: Masters Thesis
Full Text:: Effects of differential ewe body condition at mating and

Physiological factors affecting ovine uterine estrogen and progesterone receptor concentrations

Creator:: Prater, Patrice L.
Abstract:: Two experiments were conducted to determine whether in ewes uterine concentrations of estrogen and progesterone receptors are affected by the presence of a conceptus or by the hormonal milieu associated with extremes in photoperiod to which ewes are exposed. In Exp.1, nine mature ewes were unilaterally ovariectomized by removing an...
Resource Type:: Masters Thesis
Full Text:: whether uterine concentrations of steroid receptors in the ewe are influenced by seasonal fluctuations

Genetic and environmental variation in production components of purebred and crossbred ewes

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:: to survival, reproduction and growth, and for the effects of ewe body weight on reproductive traits

Characterization of the plasminogen activator produced by ovine embryos and evaluation of its physiologic role in early development

Creator:: Bartlett, Susan E.
Resource Type:: Masters Thesis
Full Text:: , 9 and 10, respectively, for a total of 18 mg per ewe. Estrus detection was initiated 24 h after the

ScholarsArchive@OSU

Relationships between hemoglobin genotype and production in cross-bred ewes. I. Reproduction and lamb production : II. Wool and milk production and health related traits

Perinatal mortality and preweaning growth of progeny of ewe lambs

Breed and heterosis effects on wool and lamb production of rotationally crossed ewes

Some effects of estradiol on ovine luteal function

In Vivo and In Vitro effects of a cyclopropenoid fatty acid on progesterone synthesis by the ovine corpus luteum

Effects of body condition and pre-lambing supplementation on ewe productivity

Effects of differential ewe body condition at mating and early post-mating nutrition on embryo survival

Physiological factors affecting ovine uterine estrogen and progesterone receptor concentrations

Genetic and environmental variation in production components of purebred and crossbred ewes

Characterization of the plasminogen activator produced by ovine embryos and evaluation of its physiologic role in early development

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