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  • BioMed Central  (1)
  • International Union of Crystallography (IUCr)  (1)
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    Electronic Resource
    Electronic Resource
    Tricarbonyl[1,1′,1′′-ethylidynetris(pyrazole-κN2)]rhenium(I) bromide and tricarbonyl[methylidynetris(pyrazole-κN2)]rhenium(I) iodide ethanol hemisolvate (2001)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. 1135-1137 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The two title compounds, [Re(C10H10N6)(CO)3]Br and [Re(C11H12N6)(CO)3]I·0.5C2H6O, have slightly distorted octahedral geometries about the rhenium centers. The distortions result from the constraints of the η3-coordinated tris(pyrazol-1-yl)methane ligands in each case which reduce the N—Re—N bond angles well below the preferred value of 90° for facially disposed ligands at a six-coordinate metal center.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270101009349
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    Paper (German National Licenses)
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    Impacts of nucleotide fixation during soybean domestication and improvement (2015)
    BioMed Central
    Details
    Publication Date: 2015-03-14
    Description: Background: Plant domestication involves complex morphological and physiological modification of wild species to meet human needs. Artificial selection during soybean domestication and improvement results in substantial phenotypic divergence between wild and cultivated soybeans. Strong selective pressure on beneficial phenotypes could cause nucleotide fixations in the founder population of soybean cultivars in quite a short time. Results: Analysis of available sequencing accessions estimates that ~5.3 million single nucleotide variations reach saturation in cultivars, and then ~9.8 million in soybean germplasm. Selective sweeps defined by loss of genetic diversity reveal 2,255 and 1,051 genes were involved in domestication and subsequent improvement, respectively. Both processes introduced ~0.1 million nucleotide fixations, which contributed to the divergence of wild and cultivated soybeans. Meta-analysis of reported quantitative trait loci (QTL) and selective signals with nucleotide fixation identifies a series of putative candidate genes responsible for 13 agronomically important traits. Nucleotide fixation mediated by artificial selection affected diverse molecular functions and biological reactions that associated with soybean morphological and physiological changes. Of them, plant-pathogen interactions are of particular relevance as selective nucleotide fixations happened in disease resistance genes, cyclic nucleotide-gated ion channels and terpene synthases. Conclusions: Our analysis provides insights into the impacts of nucleotide fixation during soybean domestication and improvement, which would facilitate future QTL mapping and molecular breeding practice.
    Electronic ISSN: 1471-2229
    Topics: Biology
    Published by BioMed Central
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