122,724 research outputs found
PGR Secure Work package 4 ‘Landrace conservation’: introduction and present achievements.
No full textCWRML: representing crop wild relative conservation and use data in XML
Get PDFBackground
Crop wild relatives are wild species that are closely related to crops. They are valuable as potential gene donors for crop improvement and may help to ensure food security for the future. However, they are becoming increasingly threatened in the wild and are inadequately conserved, both in situ and ex situ. Information about the conservation status and utilisation potential of crop wild relatives is diverse and dispersed, and no single agreed standard exists for representing such information; yet, this information is vital to ensure these species are effectively conserved and utilised. The European Community-funded project, European Crop Wild Relative Diversity Assessment and Conservation Forum, determined the minimum information requirements for the conservation and utilisation of crop wild relatives and created the Crop Wild Relative Information System, incorporating an eXtensible Markup Language (XML) schema to aid data sharing and exchange.
Results
Crop Wild Relative Markup Language (CWRML) was developed to represent the data necessary for crop wild relative conservation and ensure that they can be effectively utilised for crop improvement. The schema partitions data into taxon-, site-, and population-specific elements, to allow for integration with other more general conservation biology schemata which may emerge as accepted standards in the future. These elements are composed of sub-elements, which are structured in order to facilitate the use of the schema in a variety of crop wild relative conservation and use contexts. Pre-existing standards for data representation in conservation biology were reviewed and incorporated into the schema as restrictions on element data contents, where appropriate.
Conclusion
CWRML provides a flexible data communication format for representing in situ and ex situ conservation status of individual taxa as well as their utilisation potential. The development of the schema highlights a number of instances where additional standards-development may be valuable, particularly with regard to the representation of population-specific data and utilisation potential. As crop wild relatives are intrinsically no different to other wild plant species there is potential for the inclusion of CWRML data elements in the emerging standards for representation of biodiversity data
Physical properties and radius variations in the HAT-P-5 planetary system from simultaneous four-colour photometry
Get PDFThe radii of giant planets, as measured from transit observations, may vary with wavelength due to Rayleigh scattering or variations in opacity. Such an effect is predicted to be large enough to detect using ground-based observations at multiple wavelengths. We present the defocused photometry of a transit in the HAT-P-5 system, obtained simultaneously through Strömgren u, Gunn g and r, and Johnson I filters. Two more transit events were observed through a Gunn r filter. We detect a substantially larger planetary radius in u, but the effect is greater than predicted using theoretical model atmospheres of gaseous planets. This phenomenon is most likely to be due to systematic errors present in the u-band photometry, stemming from variations in the transparency of Earth’s atmosphere at these short wavelengths. We use our data to calculate an improved orbital ephemeris and to refine the measured physical properties of the system. The planet HAT-P-5 b has a mass of and a radius of (statistical and systematic errors, respectively), making it slightly larger than expected according to standard models of coreless gas-giant planets. Its equilibrium temperature of 1517 ± 29 K is within 60 K of that of the extensively studied planet HD 209458 b
Erratum: "Search for dark matter annihilation signals from the Fornax galaxy cluster with H.E.S.S." (2012, ApJ, 750, 123)
No full textExtent: 4 p.This is an Erratum for the article 2012 ApJ 750 123A. Abramowski...N. Maxted...G. Rowell...et al. (H.E.S.S. Collaboration
Ian Maxted : The London Book Trades, 1775-1800, 1977
No full textBaridon Michel. Ian Maxted : The London Book Trades, 1775-1800, 1977. In: Dix-huitième Siècle, n°11, 1979. L'année 1778. p. 479
Incidence des endémiques étroites parmi les espèces sauvages apparentées des plantes cultivées les plus utilisées en Méditerranée
Get PDFLandraces
No full textLandraces disseminates information about the PGR Secure project, but is also a medium to publicize different initiatives to protect landraces and to provide information on research activities focused on them
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