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  • 1
    Electronic Resource
    Electronic Resource
    Synthetic Inhibitors of HIV-1 Protease Block Processing of Pr55gag and Pr160gag-po1 Polyproteins in Infected T Lymphocytes (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 616 (1990), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1990.tb17892.x
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  • 2
    Electronic Resource
    Electronic Resource
    Nuclear DNA sequences detect species limits in ancient moa (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 425 (2003), S. 175-178 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Ancient DNA studies have typically used multi-copy mitochondrial DNA sequences. This is largely because single-locus nuclear genes have been difficult to recover from sub-fossil material, restricting the scope of ancient DNA research. Here, we have isolated single-locus nuclear DNA markers to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature01838
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  • 3
    Electronic Resource
    Electronic Resource
    The mating behavior of individuals ofDrosophila pseudoobscura from New Zealand (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 950-952 
    Details
    ISSN: 1420-9071
    Keywords: Drosophila pseudoobscura ; mating behavior ; divergence ; sterility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Recently discovered individuals in New Zealand of the North American speciesDrosophila pseudoobscura were analyzed for any divergence in mating behavior. Cultures collected from five localities in North American were mated with a stock from Rotorua, New Zealand. No significant divergence was obtained in any of the within North Americ, and more importantly, between North American and New Zealand mating experiments. Further analyses also showed no development of sterility between recently caught New Zealand and North American flies. We discuss our results in relation to others of this type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01970029
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  • 4
    Electronic Resource
    Electronic Resource
    The sensitive period for yellow phenocopy induction inDrosophila melanogaster (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 618-621 
    Details
    ISSN: 1420-9071
    Keywords: Sensitive period ; phenocopy ; yellow ; survivorship ; Drosophila melanogaster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Yellow phenocopies ofDrosophila melanogaster were produced by raising larvae on α-DMT contaminated media. Using a survivorship test, the sensitive period for phenocopy induction was found to occur during the third larval instar of development, with increased survivorship at 1% α-DMT compared with lower concentrations. It was also found that treatment with α-DMT significantly slowed development. These findings are related to the relevant morphological and behavioral developmental pathways and to phenocopy induction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01953317
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  • 5
    Electronic Resource
    Electronic Resource
    Evolution : the struggle continues (1986)
    [s.l.] : Nature Publishing Group
    Nature 321 (1986), S. 475-475 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-In an interesting and provocative article, Halstead1 rejected the anti-darwinian views of the Japanese biologist Imanishi. His rejection is apparently based on his negative impressions of Japanese society. Halstead remarked that: "the ordinary Japanese [is] condemned... to the rigid ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/321475a0
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  • 6
    Electronic Resource
    Electronic Resource
    No significant deviation from random mating of worldwide populations of Drosophila melanogaster (1982)
    [s.l.] : Nature Publishing Group
    Nature 300 (1982), S. 437-440 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Components of mating success in Drosophila are under genetic control1 and in laboratory populations the component of darwinian fitness which includes the 'selection' of mates is important in determining reproductive success2"4. Genetically based variation in 'premating isolating mechanisms' occurs ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/300437a0
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  • 7
    Electronic Resource
    Electronic Resource
    Does mate choice occur in Drosophila melanogaster ? (1981)
    [s.l.] : Nature Publishing Group
    Nature 293 (1981), S. 492-492 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PARTRIDGE1 recently reported the results of a series of experiments purporting to demonstrate that "... one component of offspring fitness can be increased by mate choice in Drosophila melanogaster". Her experiments involved the mating of females to single males and to a choice of males. The data ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/293492a0
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  • 8
    Electronic Resource
    Electronic Resource
    Laboratory-induced changes in the mate recognition system ofDrosophila pseudoobscura (1986)
    Springer
    Behavior genetics 16 (1986), S. 285-294 
    Details
    ISSN: 1573-3297
    Keywords: Drosophila pseudoobscura ; speciation ; laboratory culturing ; mate recognition systems ; asymmetrical mating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Drosophila pseudoobscura stocks maintained in laboratory culture for some time had altered mate recognition systems compared with recently collected control stocks. Three showed a significant deviation from random mating; in one, a tendency toward homogametic mating was recorded. Such deviations are in marked contrast to results from populations which have been recently collected from the field. Asymmetrical mating was observed in two of the crosses in the direction predicted by the Kaneshiro model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01070804
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  • 9
    Electronic Resource
    Electronic Resource
    The stability of the specific-mate recognition system ofDrosophila melanogaster (1986)
    Springer
    Behavior genetics 16 (1986), S. 369-373 
    Details
    ISSN: 1573-3297
    Keywords: specific-mate recognition systems,Drosophila melanogaster ; evolution, mating behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract The present data illustrate an important characteristic of the mate recognition system of individuals ofDrosophila melanogaster. This system showed a high degree of stability, and the stability occurred even though the populations under investigation were divergent in other characteristics. We review the results of other studies of this type, discuss our results in terms of the general characteristics of specific-mate recognition systems, and account for its stability in terms of the structure of the communication system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01071318
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  • 10
    Electronic Resource
    Electronic Resource
    The population genetics of reinforcing selection (1983)
    Springer
    Genetica 62 (1983), S. 15-23 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A common outcome of disruptive selection experiments between two differentiated populations which produce disadvantageous hybrids is an increase in homogamy. Experiments reported here result in another outcome when ‘classical’ selection experiments are redesigned. In these modified experiments, frequencies of genotypes in the mating population were not artificially maintained at parity but were instead determined from progeny proportions in the previous generation. In these selection lines another outcome, apart from an increase in homogamy, was demonstrated. Under a high selection coefficient against heterozygotes, elimination of a homozygote and the corresponding fixation of the other was observed. No selection line demonstrated the maintenance of two differentiated populations concurrently with the selection process of heterozygote disadvantage. A high number of generations of selection under this population genetical process is necessary to increase differences between two populations. However, the instability of gene frequencies which results in fixation or elimination of a homozygote is shown to be extremely rapid by comparison. Classical experiments were repeated and after 21 generations of selection there was no increase in divergence. For lower selection coefficients, high levels of introgression are apparent, and hence the genetical distinctness of the two populations decreases over time. This is in addition to the problem of an unstable equilibrium under selection against heterozygotes. Both aspects are important but not previously considered in experimental evidence for speciation models for which their implications are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00123305
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