Search Results - (Author, Cooperation:W. S. Davidson)

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  1. 1
    Staff View
    Publication Date:
    2016-04-19
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-03-29
    Publisher:
    Genetics Society of America (GSA)
    Electronic ISSN:
    2160-1836
    Topics:
    Biology
    Published by:
    http://www.genetics-gsa.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Hartley, S. E. ; Bartlett, S. E. ; Davidson, W. S.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1992
    Staff View
    ISSN:
    1095-8649
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    Mitochondrial DNA analysis of a total of 82 individuals from seven Scottish populations of Arctic charr (Salvelinus alpinus L.) using restriction fragment length polymorphism and direct nucleotide sequencing of the cytochrome b gene revealed little variation within or between populations. One of 19 restriction enzymes showed a polymorphism that was present in three of the seven populations. Only one nucleotide substitution was detected in a 288 base pair segment of the cytochrome b gene examined in 26 fish. Approximately 4% of the mitochondrial genome was surveyed with these complementary procedures.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1095-8649.1992.tb02568.x

    Articles: DFG German National Licenses
  4. 4
    Davidson, W. S. ; Birt, T. P. ; Green, J. M.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1989
    Staff View
    ISSN:
    1095-8649
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    The increasing exploitation of Atlantic salmon as a food source and sport fish demands a better understanding of salmon genetics and the dynamics of Atlantic salmon populations. Surveys of salmon populations for protein electrophoretic variation reveal that the average heterozygosity in Salmo salar is low and that four gene loci account for more than 95% of the total electrophoretically detectable variation. Populations that have been studied by this means fall into one of three groups: Western Atlantic, Eastern Atlantic or Baltic. However, biochemical genetics involving starch gel electrophoresis cannot be used routinely to identify the continent of origin of an Atlantic salmon, let alone its native river. The mitochondrial genome can be used to identify North American or European salmon with the aid of restriction endonucleases that have six base pair recognition sites. Restriction endonucleases that recognize four base pairs appear to be able to identify salmon from a particular river system. There has been a move from protein variation to mitochondrial DNA variation and this will inevitably lead to more extensive studies on the nuclear genome. Chromosomal studies suggest differences between salmon from Europe and North America but these have been hampered by lack of good banding procedures. Preliminary studies using cloned segments of salmonid genomes suggest that repeated sequences such as the genes for ribosomal RNA will be most useful for identifying specific stocks of Atlantic salmon. The need for continued genetic studies on the Atlantic salmon and the relevance and importance of the results of this research for stock identification, enhancement programmes, aquaculture and basic science are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1095-8649.1989.tb03334.x

    Articles: DFG German National Licenses
  5. 5
    McGowan, C. ; Davidson, W. S.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1998
    Staff View
    ISSN:
    1095-8649
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    The RAPD technique failed to detect a male-specific genetic marker in Atlantic salmon Salmo salar.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1095-8649.1998.tb00469.x

    Articles: DFG German National Licenses
  6. 6
    Mcveigh, H. P. ; Davidson, W. S.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1991
    Staff View
    ISSN:
    1095-8649
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Notes:
    Partial mitochondrial cytochrome b gene sequences of eight salmonid species were used in a PAUP analysis to generate a phylogeny of the group. The four genera represented are Salmo, Salvelinus, Oncorhynchus and Thymallus. The inferred phylogenetic tree coincides well with the classically derived one for these genera. The recent reclassification of the rainbow trout as a member of the genus Oncorhynchus is supported. The assignment of grayling as the outgroup is vindicated. The utility of gene sequence data to infer the phylogenetic relationships of the Salmonidae is discussed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1095-8649.1991.tb05090.x

    Articles: DFG German National Licenses
  7. 7
    Davidson, W. S.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1957
    Staff View
    ISSN:
    1440-0960
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1440-0960.1957.tb01539.x

    Articles: DFG German National Licenses
  8. 8
    Mitchell, C. M. ; Davidson, W. S. ; Chodakowski, J. A. ; McVeigh, J.

    New York : Periodicals Archive Online (PAO)
    Published 1985
    Staff View
    ISSN:
    0091-0562
    Topics:
    Psychology
    URL:
    http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:c034-1985-013-05-000004

    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    1432-1793
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract Harp seals (Pagophilus groenlandicus Erxleben, 1777) comprise three populations based upon whelping areas in the Greenland Sea, White Sea, and Northwest Atlantic. The last comprises two subpopulations, one whelping in the Gulf of St. Lawrence (“Gulf ”) and one on the pack ice of the southern Labrador/northern Newfoundland coastal shelf (“Front”). A total of 40 female seals from the four whelping areas were collected during the 1990 and 1992 whelping seasons. DNA sequence variation was examined in a 307 bp region of the mitochondrial cytochrome b gene. Eleven variable nucleotide positions defined 13 genotypes: a significant fraction of the genotypic variance (F ST=0.12, or 0.09 as measured by Weir's coancestry coefficient θ) is attributable to differentiation between Northwest and Northeast Atlantic populations. There was no significant differentiation between the two whelping areas in the Northwest Atlantic, or between the Greenland Sea and White Sea. These findings suggest significant reproductive isolation exists between trans-Atlantic breeding populations.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s002279900248

    Articles: DFG German National Licenses
  10. 10
    Staff View
    ISSN:
    1573-6776
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    Summary Two strains of Entomophthora egressa which differ in their pathogenicity towards the spruce budworm were surveyed for the presence of double-stranded RNA mycoviruses. There was no evidence for the occurrence of any mycovirus in either strain. This indicates that virulence in E. egressa is not associated with a mycovirus.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00135681

    Articles: DFG German National Licenses
  11. 11
    Caldwell, R. A. ; Bogat, G. A. ; Davidson, W. S.
    Springer
    Published 1992
    Staff View
    ISSN:
    1573-2770
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Psychology
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00942240

    Articles: DFG German National Licenses
  12. 12
    Caldwell, R. A. ; Bogat, G. A. ; Davidson, W. S.
    Springer
    Published 1992
    Staff View
    ISSN:
    1573-2770
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Psychology
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01312610

    Articles: DFG German National Licenses
  13. 13
    Staff View
    ISSN:
    1573-2770
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Psychology
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00923266

    Articles: DFG German National Licenses