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  • 1
    Electronic Resource
    Electronic Resource
    Germplasm collections of endangered agroforestry tree species: the case of Prosopis africana in the semi-arid lowlands of West Africa (1997)
    Springer
    Agroforestry systems 39 (1997), S. 91-100 
    Details
    ISSN: 1572-9680
    Keywords: long-term conservation ; Sahel ; seed collection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The International Centre for Research in Agroforestry (ICRAF) coordinates a research network in the Semi-arid Lowlands of West Africa (SALWA) in four countries: Burkina Faso, Niger, Mali and Senegal. Prosopis africana, an important agroforestry tree species is seriously threatened in this eco-region. ICRAF organized seed collections of this species for long-term conservation and subsequent utilization by small-scale farmers in the West African Sahel. Prior to the collection, ICRAF, the International Plant Genetic Resources Institute (IPGRI) and International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) organized a planning workshop with collaborating national research institutes. Out of this workshop came a consensus on the strategy, logistics and choice of collection sites. To collect as much genetic diversity of P. africana in the SALWA region as possible, 34 collection sites were selected: 15 in Niger, eight in Mali, seven in Burkina Faso and four in Senegal. The main aim of the collection was to capture the genetic diversity within P. africana before the valuable genetic resources are lost. This paper reviews the methodology and results of the germplasm collection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005887706700
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A bibliography and review of genetic diversity studies of African germplasm using protein and DNA markers (1997)
    Springer
    Genetic resources and crop evolution 44 (1997), S. 447-470 
    Details
    ISSN: 1573-5109
    Keywords: Africa ; crop evolution ; DNA technology ; genetic diversity ; genetic markers ; germplasm ; isozyme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A review of the existing literature available on the bibliographic CD-ROM PlantGeneCD on the use of protein and molecular markers on plant material from sub-Saharan Africa was undertaken. The review showed that these molecular techniques have been used in a wide range of studies, from measurement of genetic diversity within single population to the elucidation of phylogenetic relationship among species in a genus or group of genera. The review revealed that 67% of the 146 studies examined used protein electrophoresis (58% isozymes, the rest mostly seed proteins), 20% used RFLPs, 8% RAPDs and 3% sequencing. Isozymes have been used for a whole range of applications, whereas electrophoresis of other proteins has mainly been used to study ecogeographic distribution of diversity in crops. RAPDs have been used particularly in the investigation of genetic relationship among accessions of a single species and phylogentic relationship among species. RFLPs of cpDNA have mostly been used at the interspecific level and nuclear markers at the intraspecific level. The studies covered most of the major crop species of Africa and their wild relatives, though important gaps remain, for example sweet potato. So-called “minor” crops were not well represented. Wild taxa not related to crops were also covered, in particular agroforestry and forest species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008676617657
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Towards the selection of taxa for plant genetic conservation (1997)
    Springer
    Genetic resources and crop evolution 44 (1997), S. 337-348 
    Details
    ISSN: 1573-5109
    Keywords: conservation ; methodology ; PGR ; priorities ; target taxa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The signing and ratification of the Convention on Biological Diversity has resulted in increased scientific and public interest in the conservation and utilisation of biological diversity. This has in turn triggered the need to develop more effective methodologies to conserve biological diversity for the benefit of all humanity. One of the first factors to be considered when conserving botanical diversity is the efficient and effective selection of the target taxa. The aim of this paper is not to set detailed priorities for the genetic conservation of the plant genetic resources of any particular crop or species complex, but to draw attention to the factors that should be considered when formulating priorities. The factors that are considered important when selecting plant genetic resource targets are: current conservation status; potential economic use; threat of genetic erosion; genetic distinctiveness; ecogeographic distribution; biological importance; cultural importance; cost, feasibility and sustainability; legislation; ethical and aesthetic considerations; and priorities of the conservation agency undertaking the conservation. Each of these factors is discussed in turn. Although it is not possible to provide a single methodology for the selection of plant genetic resource targets at this time, it is hoped that the consideration the factors discussed will make the selection of target taxa more object, make better use of the limited conservation resources and thus enhance the process of genetic conservation as a whole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008643206054
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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