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  • 1
    Electronic Resource
    Electronic Resource
    Are mapped markers more useful for assessing genetic diversity? (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 607-613 
    Details
    ISSN: 1432-2242
    Keywords: Key words AFLP ; Biodiversity ; Genetic maps ; Genetic resources ; Rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Genetic diversity within populations of organisms and species is commonly measured using molecular-marker data. It has been claimed that more reliable diversity measurements can be obtained using selected genetically mapped markers to ensure that all regions of the genome are represented in the data sets employed. However, this has not been tested. In the present study, using rice (Oryza sativa L.) as a model species, we have shown that the use of unmapped AFLP markers reveals a pattern of diversity that is very similar to that obtained using a range of other marker types and which reflects the known crossability groups within this species. In contrast, we show that use of mapped-marker data can, in some cases, result in highly misleading patterns of diversity; the results obtained are critically related to the choice ofparents used in the cross from which the mapping population was produced. For diversity analyses, we propose that it is appropriate to use unmapped markers provided that the marker-type has been shown to have a wide distribution over the genome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050080
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The identification of duplicate accessions within a rice germplasm collection using RAPD analysis (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 1049-1055 
    Details
    ISSN: 1432-2242
    Keywords: Oryza sativa ; Rice ; Genetic resources ; RAPD ; Molecular markers ; Cluster analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A set of accessions of Oryza sativa from the International Rice Research Institute (Philippines) that included known and suspected duplicates as well as closely related germplasm has been subjected to RAPD analysis. The number of primers, the number of polymorphic bands and the total number of bands were determined that will allow the accurate discrimination of these categories of accessions, including the identification of true and suspected duplicates. Two procedures have been described that could be employed on a more general basis for identifying duplicates in genetic resources collections, and further discussion on the values of such activities is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222920
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Reproductive characters associated with breeding behaviour inBeta sect.Beta (Chenopodiaceae) (1983)
    Springer
    Plant systematics and evolution 143 (1983), S. 277-283 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Chenopodiaceae ; Beta ; Reproductive biology ; allogamy versus autogamy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Populations of different taxa withinBeta sect.Beta were compared using a number of floral and reproductive characters. Plants which were known to be self-incompatible (through S-allele incompatibility) were found to be morphologically distinct from those which were self-compatible, with the floral characteristics of the latter promoting their autogamy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00986609
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The taxonomic characterisation of annual Beta germplasm in a genetic resources collection using RAPD markers (1996)
    Springer
    Euphytica 91 (1996), S. 205-212 
    Details
    ISSN: 1573-5060
    Keywords: Beta ; genetic resources ; RAPD ; annual beets ; molecular marker ; polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Annual beets in the genus Beta section Beta represent an important genetic resource. Representative accessions of annual beets from a beet germplasm collection were analysed using RAPD to assess the patterns of variation and relationships among them. Using arbitrary primers, markers showing variation across accessions were identified. A dendrogram of similarity was produced using these molecular markers. All the accessions analysed were classified into three major groups corresponding to species or subspecies macrocarpa, adanensis and maritima. Macrocarpa was shown to be the most divergent group in this section. Using RAPD molecular markers, it was possible to ascribe an accession to one of three taxonomic groups and overcome much of the confusion encountered when morphological traits are used for identification. The group of maritima was found to be more polymorphic than either the group of macrocarpa or adanensis at both accession and subspecies levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021071
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    Paper (German National Licenses)
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