Sponsor
Portland State University. Department of Biology
First Advisor
Lester J. Newman
Term of Graduation
Spring 1976
Date of Publication
5-19-1976
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Biology
Department
Biology
Language
English
Subjects
Chromosomes, Rainbow trout, Hybridization, Cutthroat trout
DOI
10.15760/etd.2351
Physical Description
1 online resource (31 pages)
Abstract
A study was undertaken to investigate the application of tissue culture and histochemical banding techniques normally used in mammalian studies to fish cells and to examine the mechanisms of chromosome evolution and speciation in salmonids by comparing the chromosomes of the hybrid to those of the parental types. The application of banding techniques was generally unsuccessful in revealing bands, though quinacrine staining did reveal the presence of two fluorescent spots in the vicinity of the centromere. These were thought to be heterochromatic blocks, possibly related to the high incidence of centric fusion or fission in salmonids. Results of chromosome analysis showered a higher incidence of acrocentric chromosomes in the hybrid than in either parental type which together with evidence for tetraploidization in salmonids is consistent with some of the requirements for species diversification. Conditions of divergence in chromosome evolution and changes which would have to occur in the hybrid for divergence from the parental types to take place are discussed. The results of a preliminary electrophoretic examination of LDH and esterase activity tended to confirm hybridization.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
http://archives.pdx.edu/ds/psu/15604
Recommended Citation
Jacky, Peter Bruce Valentine, "The Chromosome Constitutions of a Hybrid Salmonid and its Parental Types: Salmo Gairdneri and Salmo Clarki" (1976). Dissertations and Theses. Paper 2355.
https://doi.org/10.15760/etd.2351
Comments
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