Graduate Thesis Or Dissertation

 

A mendelian study of Crassostrea gigas Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/6m311s71s

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  • The genotype frequencies of one-year-old oyster spat (Crassostrea gigas) from parents of known genotype, are compared to the frequencies expected with Mendelian inheritance. The genotypes are characterized at three enzyme loci, Aspartate amino-transferase (AAT), Phosphohexose isomerase (PHI) and Leucine aminopeptidase (LAP), and a general protein locus. In this study expression of these loci as histochemically stained patterns on a gel following electrophoresis is controlled by two codominant alleles at each locus. Frequencies of the genotypes at all four loci, in all offspring groups investigated, are not statistically different from those expected with Mendelian inheritance, supporting the hypothesis that this is the method of inheritance. It is further concluded that there are no large amounts of selection connected with any of these loci. An additional observation, that there is no statistical difference between genotype ratios of siblings in two different growing areas, is discussed in terms of G. Williams' (1975) "elm-oyster" model. It is suggested that the search for selection at single loci is probably not a generally useful one for the oyster breeder.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-02-25T22:38:37Z (GMT) No. of bitstreams: 1 SmokerJanetVanDusen1977.pdf: 1918996 bytes, checksum: 6cbeba34c460ffc68ff12233b3431d7f (MD5)
  • description.provenance : Made available in DSpace on 2013-02-25T22:38:37Z (GMT). No. of bitstreams: 1 SmokerJanetVanDusen1977.pdf: 1918996 bytes, checksum: 6cbeba34c460ffc68ff12233b3431d7f (MD5) Previous issue date: 1976-07-30

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