P W GREGORY's research while affiliated with University of California and other places
What is this page?
This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
Publications (13)
Data from additional mating tests support earlier evidence that the type of female sterility in the California Experiment Station Jersey Herd is conditioned by an autosomal recessive gene. Additional data also support an earlier conclusion that the gene conditioning the sterility is of relatively high frequency in certain lines in the Jersey breed....
Citations
... Reports from cattlemen throughout the United States indicate that th e incidence of dwarfism is also increasing in commercial herds. This study is directed toward the type of dwarfism studied by Johnson et ale (1950), Gregory et ale (1951,1952), Carroll et ale (1951), and Lindley (1951). The first reference to this form of dwarfism, which is also present in Angus and Shorthorn cattle, seems to be Craft and Orr (1924). ...
... Inbreeding appears to have a substantial influence on morphology of spermatozoa (Gregory et al., 1951;Donald and Hancock, 1953;Hultnäs, 1959;Harris et al., 1960). ...
... and WAD x WAD (1.09±0.11kg). Birth weight of a kid is a reproductive trait that could be influenced by such factors as body weight and condition score of dam, nutritional status, type of birth, sex and season of the year (Cassard et al., 1956). The WAD dams were well adapted to the rearing environment and may have utilized the concentrate -fodder based ration better than their RS dam counterparts. ...
... Apresenta-se em duas formas básicas, o nanismo proporcional e o nanismo desproporcional, sendo que nesta última forma as apresentações fenotípicas são variadas e classificam-se, com base em suas características morfológicas, em tipo bulldog (Dexter), tipo Telemark, tipo snorter (braquicefálico) e tipo cabeça alongada (dolicocefálico) (Thompson 2007). As diversas formas deste defeito são observadas em várias raças bovinas incluindo a Dexter (Harper 1998), Telemark (Thompson 2007), Holandês (Naito et al. 2002, Thompson 2007, Aberdeen Angus, Hereford e Shorthorn (Mishra, 2004), Jersey, Guernsey, Ayrshire e Charolês (Gregory et al. 1951, Thompson 2007. Nanismo proporcional hereditário foi diagnosticado em rebanhos da raça Angus na Austrália (Latter et al. 2006). ...
... A number of lethal and semi-lethal genes affecting embryonic mortality in the turkey have been identified by Asmundson (1939Asmundson ( , 1942Asmundson ( , 1944 and by Hutt and Mueller (1942). The present authors know of no published evidence showing the existence of identifiable "sterility" genes in the turkey, although the subject has received considerable attention in other species (Stern, 1936;Mather and Harrison, 1949;Dobzhansky, 1933;Gregory et al., 1945). ...
... Sires were to be selected for their ability to transmit high milk yield. During the 1930's one line was discontinued because of a highly variable milk yield and the two remaining lines were merged due to a curtailment of funds and an attempt to eliminate two sires each of which was found to be heterozygous for a different recessive lethal gene (MEAD, GREGORY, and REGAN 1946). Within sire groups there was no culling of female progeny unless a heifer failed to breed after repeated matings. ...
... Bilateral convergent strabismus with exophthalmos (BCSE) is a most likely hereditary eye defect in cattle, which has been described in different breeds like Jersey, German Braunvieh, German Fleckvieh and Holstein cattle affecting animals at different ages [1][2][3][4]. Affected animals exhibit a progressive mostly bilateral symmetric anterio-medial rotation of the eyes associated with a variable protrusion of the eyeballs [3,5]. The fixation of the bulbi causes visual impairment [1,3] and can lead to complete blindness in advanced cases due to the disappearance of the pupils behind the anterio-medial angle of the orbit [6] (Figure 1). ...
