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Creator:: Chapman, Verne Merrill
Abstract:: The design of this study was suggested by the following observations: (1) the successful application of recurrent selection techniques in obtaining improvement of hybrid performance in corn and Drosophila, (2) the increased production realized by rotational crossbreeding, and (3) the expression of a relatively large degree of hybrid vigor in...
Resource Type:: Dissertation
Full Text:: and significant learning experiences and I would like to thank Dr. David C. England for the

Creator:: Thompson, Robert Charles, 1927-
Abstract:: In this study subcutaneous, inter- and intramuscular fats from 42 Hereford steers were analyzed for their fatty acid composition using gas-liquid chromatography. The same tissues were analyzed from one pair each of identical twins of Angus and Shorthorn breeding. Muscle and liver lipids from these latter four animals were fractionated...
Resource Type:: Dissertation
Full Text:: appreciation to Dr. David C. Church, Associate Professor of Animal Science, for his encouragement and

Creator:: Walker, Calvin
Abstract:: In a swine production and breeding experiment, Yorkshire gilts were evaluated for the influences of heredity-and some environmental components on occurrence of puberty in gilts in confinement. In the first experiment, 186 Yorkshire gilts reared and maintained in total confinement were used in a study to assess effects of several...
Resource Type:: Dissertation
Full Text:: Influences of Heredity and Some Environmental Components on Occurrence of Puberty in Gilts in Confinement c

Creator:: Bellatty, Paul T.
Abstract:: Purebred and crossbred litters of Yorkshire and Berkshire breeds of swine were evaluated for number of piglets born alive per litter, number of piglets weaned per litter, mean piglet birth weight, mean piglet birth weight adjusted for number of piglets born alive per litter and mean piglet weaning weight. The...
Resource Type:: Dissertation
Full Text:: of Swine of Berkshire and Yorkshire Origin / Abstract appro-V-ed _Redacted for Privacy David C

Creator:: Archibong, Anthony Effanga
Abstract:: An experiment was conducted to compare the reproductive performance and serum concentrations of progesterone and estrogen of mated first (n=18) and third (n=18) estrous gilts slaughtered in equal numbers on days 3, 15 and 30 postmating. Fertilization rate did not differ between mated first and third estrous gilts. Embryonic survival...
Resource Type:: Dissertation
Full Text:: Fredrick Stormshak Abstract approv4iRedacted for Privacy David C.44gland An experiment was conducted to

Creator:: Kwansa, Wilhelmina
Resource Type:: Dissertation
Full Text:: Litters to Feeding Patterns Redacted for Privacy Abstract approved:' Dr. David C. England Preweaning

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