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  • 1
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    Why conservationists should heed Pokemon (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balmford, Andrew -- Clegg, Lizzie -- Coulson, Tim -- Taylor, Jennie -- New York, N.Y. -- Science. 2002 Mar 29;295(5564):2367.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11924673" target="_blank"〉PubMed〈/a〉
    Keywords: Child ; Child, Preschool ; *Conservation of Natural Resources ; *Ecosystem ; Education ; Female ; Humans ; *Learning ; Male
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Population biology: fur seals signal their own decline (2014)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2014-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coulson, Tim -- Clegg, Sonya -- England -- Nature. 2014 Jul 24;511(7510):414-5. doi: 10.1038/511414a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Oxford, Oxford OX1 3PS, UK. ; 1] Department of Zoology, University of Oxford, Oxford OX1 3PS, UK. [2] Griffith School of Environment and Environmental Futures Research Institute, Griffith University, Gold Coast Campus, Queensland, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25056058" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Climate Change ; Female ; Fur Seals/*genetics ; *Heterozygote
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Linkage analysis of nondeletion hereditary persistence of fetal hemoglobin (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-02-19
    Description: Nondeletion forms of hereditary persistence of fetal hemoglobin may result from regulatory disorders of globin gene expression. The defects in two such conditions were localized by demonstrating a tight genetic linkage between the disorders and polymorphic restriction endonuclease sites within the beta-like globin gene complex. In one instance, the defect probably occurred outside the region of DNA between the epsilon- and beta-globin genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Old, J M -- Ayyub, H -- Wood, W G -- Clegg, J B -- Weatherall, D J -- New York, N.Y. -- Science. 1982 Feb 19;215(4535):981-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6186021" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Deletion ; DNA Restriction Enzymes ; Female ; Fetal Hemoglobin/*genetics ; Genetic Linkage ; Globins/genetics ; Humans ; Male ; Pedigree ; Polymorphism, Genetic ; Thalassemia/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
    Electronic Resource
    Electronic Resource
    The Ds1 controlling element family in maize andTripsacum (1987)
    Springer
    Journal of molecular evolution 26 (1987), S. 329-334 
    Details
    ISSN: 1432-1432
    Keywords: Maize ; Ac ; Ds ; Controlling elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Hybridization experiments indicated that the maize genome contains a family of sequences closely related to the Ds1 element originally characterized from theAdh1-Fm335 allele of maize. Examples of these Ds1-related segments were cloned and sequenced. They also had the structural properties of mobile genetic elements, i.e., similar length and internal sequence homology with Ds1, 10- or 11-bp terminal inverted repeats, and characteristic duplications of flanking genomic DNA. All sequences with 11-bp terminal inverted repeats were flanked by 8-bp duplications, but the duplication flanking one sequence with 10-bp inverted repeats was only 6 bp. Similar Ds1-related sequences were cloned fromTripsacum dactyloides. They showed no more divergence from the maize sequences than the individual maize sequences showed when compared with each other. No consensus sequence was evident for the sites at which these sequences had inserted in genomic DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02101151
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  • 5
    Electronic Resource
    Electronic Resource
    Evolution of Ac and Dsl elements in select grasses (Poaceae) (1992)
    Springer
    Genetica 86 (1992), S. 55-66 
    Details
    ISSN: 1573-6857
    Keywords: Ac ; Dsl ; Poaceae ; transposable elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We present data on evolution of the Ac/Ds family of transposable elements in select grasses (Poaceae). An Ac-like element was cloned from a DNA library of the grass Pennisetum glaucum (pearl millet) and 2387 bp of it have been sequenced. When the pearl millet Ac-like sequence is aligned with the corresponding region of the maize Ac sequence, it is found that all sequences corresponding to intron II in maize Ac are absent in pearl millet Ac. Kimura's evolutionary distance between maize and pearl millet Ac sequences is estimated to be 0.429±0.020 nucleotide substitutions per site. This value is not significantly different from the average number of synonymous substitutions for coding regions of the Adh1 gene between maize and pearl millet, which is 0.395±0.051 nucleotide substitutions per site. If we can assume Ac and Adh1 divergence times are equivalent between maize and pearl millet, then the above calculations suggest Ac-like sequences have probably not been strongly constrained by natural selection. The level of DNA sequence divergence between maize and pearl millet Ac sequences, the estimated date when maize and pearl millet diverged (25–40 million years ago), coupled with their reproductive isolation/lack of current genetic exchange, all support the theory that Ac-like sequences have not been recently introduced into pearl millet from maize. Instead, Ac-like sequences were probably present in the progenitor of maize and pearl millet, and have thus existed in the grasses for at least 25 million years. Ac-like sequences may be widely distributed among the grasses. We also present the first 2 Dsl controlling element sequences from teosinte species: Zea luxurians and Zea perennis. A total of 10 Dsl elements had previously been sequenced from maize and a distant maize relative, Tripsacum. When a maximum likelihood network of genetic relationships is constructed for all 12 sequenced Dsl elements, the 2 teosinte Dsl elements are as distant from most maize Dsl elements and from each other, as the maize Dsl elements are from one another. Our new teosinte sequence data support the previous conclusion that Dsl elements have been accumulating mutations independently since maize and Tripsacum diverged. We present a scenario for the origin of Dsl elements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00133711
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  • 6
    Electronic Resource
    Electronic Resource
    Molecular evolutionary characterization of an Activator (Ac)-like transposable element sequence from pearl millet (Pennisetum glaucum) (Poaceae) (1994)
    Springer
    Genetica 92 (1994), S. 77-89 
    Details
    ISSN: 1573-6857
    Keywords: Ac ; pearl millet ; transposable elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We present data on the evolution of the Ac/Ds family of transposable elements in select grasses (Poaceae). A defective Ac-like element was cloned from a DNA library of the grass Pennisetum glaucum (pearl millet) and its entire 4531 bp sequence has been determined. When the pearl millet Ac-like sequence is aligned with the maize Ac sequence, it is found that there is approximately 70% DNA similarity in the central region spanning most of maize Ac exon II and all of exon III. In addition, there are two smaller regions of similarity at the Ac terminii. Besides these three major structural similarities, Pennisetum Ac has two large regions, one 5′ and one 3′, that show little similarity to Zea Ac. Furthermore, most of the sequences corresponding to intron II in maize Ac are absent in pearl millet Ac. Kimura's evolutionary distance between the central region of maize and pearl millet Ac sequences is estimated to be 0.429±0.020 nucleotide substitutions per site. This value is not significantly different from the average number of synonymous substitutions for coding regions of the Adh1 gene between maize and pearl millet, which is 0.395±0.051 nucleotide substitutions per site. If we assume Ac and Adh1 divergence times are equivalent between maize and pearl millet, then the above calculations suggest Ac-like sequences have probably not been strongly constrained by natural selection. Conserved DNA and amino acid sequence motifs are also examined. The level of DNA sequence divergence between maize and pearl millet Ac sequences, the estimated date when maize and pearl millet diverged (25–40 million years ago), coupled with their reproductive isolation/lack of current genetic exchange, all support the theory that Ac-like sequences have not been recently introduced into pearl millet from maize. Instead, Ac-like sequences were probably present in the progenitor of maize and pearl millet and have thus existed in the grasses for at least 25 million years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163756
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