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Effectiveness of selection for productive characteristics in developing the Montana no. I hogs

Creator:: McEwen, Wesley Charles
Abstract:: One of the most important productive characteristics of hogs is reproductive efficiency. Reproductive efficiency is best measured by litter size at weaning. Litter size at birth and weight of the pigs at birth are among the most important factors affecting litter size at weaning. It has been demonstrated that less...
Resource Type:: Masters Thesis
Full Text:: year of ae were indicated by Russel and Hutton (2L, p.1-28). Although they found no differences in

Some genetic and environmental factors affecting weaning weights of lambs

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:: ) (Degree) (Major) Date thesis is presented October 28, 1965 Title SOME GENETIC AND ENVIRONMENTAL

Ova tranfers in sheep and rabbits : studies on material influences and irradiation damage

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:: . Histological exarninations of eight-day ernbryos which received 6l,Z rads or no irradiation as two-cell ova

Comparative values of liver nicotinamide nucleotide coenzymes, endocrine glands, and their relationships with production traits of diallel crossed beef bulls

Creator:: Anwar-Afghan, Mohammad
Abstract:: This investigation for the first time reports information on the correlation of various forms and ratios of nicotinamide nucleotide coenzymes in the liver tissue and endocrine glands weight with various production traits. Fifty-five inbred and line cross beef bulls raised under standard management conditions and slaughtered at 1000 lbs. body...
Resource Type:: Dissertation
Full Text:: day decreases. No significant correlation of any kind was observed between pituitary gland weight

Actual and predicted response to selection on maternally influenced traits in the mouse

Creator:: Lind, Ronald Egnard
Abstract:: An experiment was conducted to determine if selection from standardized litters would be effective in separating lines of mice selected for increased and decreased litter weight at 14 days of age, and if response to selection on this maternally influenced trait could be accurately predicted. Data were collected on litter...
Resource Type:: Dissertation
Full Text:: - tively. There were no differences between high, low and control line progeny when they were reared by

Effects of radiation on selection progress in mice

Creator:: Womack, James Ernest
Abstract:: The effects of x-irradiation on quantitative genetic traits was investigated by comparing the response of irradiated mice to selection for litter size and 28-day weight with the response to selection for the same two traits in non-irradiated lines. Irradiated lines were maintained at three levels of x-irradiation, 25 r, 50...
Resource Type:: Dissertation
Full Text:: 28 -day weight with the response to selection for the same two traits in non -irradiated lines

The effects of thiouracil and thyroprotein on growth, wool production and fertility of rams

Creator:: Adams, Charles C.
Resource Type:: Masters Thesis
Full Text:: (40). In rams (52) no definite trend was indicated, but animals lost weight during the early part

Selection for body weight in synthetic monoparous populations of mice

Creator:: Mason, Robert William
Resource Type:: Dissertation
Full Text:: females of which 28 were from strain O, 28 from strain V, 28 froni strain C, and. 28 from strain

Influence of chelating agents on cytological exchanges and genetic recombination in Zea mays L.

Creator:: Jones, Donald Dean
Abstract:: The present investigation with the chromosomes of Zea mays was conducted to determine: (1) the effects of chelating agents on the process of cytological exchange, and (2) the effects of chelating agents on genetic recombination. To ascertain the influence of chelating agents on cytological exchange, four known heterozygolis paracentric inversion...
Resource Type:: Dissertation
Full Text:: ) chromosome three with an inverted segment of 28 map units, (3) chromosome seven with a large inversion in

Effects of radiation on selection progress in mice

Creator:: Womack, James Ernest
Abstract:: The effects of x-irradiation on quantitative genetic traits was investigated by comparing the response of irradiated mice to selection for litter size and 28-day weight with the response to selection for the same two traits in non-irradiated lines. Irradiated lines were maintained at three levels of x-irradiation, 25 r, 50...
Resource Type:: Dissertation
Full Text:: 28 -day weight with the response to selection for the same two traits in non -irradiated lines

ScholarsArchive@OSU

Effectiveness of selection for productive characteristics in developing the Montana no. I hogs

Some genetic and environmental factors affecting weaning weights of lambs

Ova tranfers in sheep and rabbits : studies on material influences and irradiation damage

Comparative values of liver nicotinamide nucleotide coenzymes, endocrine glands, and their relationships with production traits of diallel crossed beef bulls

Actual and predicted response to selection on maternally influenced traits in the mouse

Effects of radiation on selection progress in mice

The effects of thiouracil and thyroprotein on growth, wool production and fertility of rams

Selection for body weight in synthetic monoparous populations of mice

Influence of chelating agents on cytological exchanges and genetic recombination in Zea mays L.

Effects of radiation on selection progress in mice

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