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  • 1
    Electronic Resource
    Electronic Resource
    Genetic mapping of the barley Rrs14 scald resistance gene with RFLP, isozyme and seed storage protein markers (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 119 (2000), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The scald susceptible barley cultivar ‘Clipper’ and a third-backcross (BC3) line homozygous for the Rrs14 scald resistance gene that originally came from Hordeum vulgare ssp. spontaneum were grown in replicated field trials. The level of resistance that Rrs14 confers against field populations of the pathogen Rhynchosporium secalis, the causal agent of scald disease, was evaluated. The Rrs14 BC3 line exhibited 80% and 88% less leaf damage than ‘Clipper’ in 1995 and 1996, respectively. Given this effectiveness of Rrs14, research was undertaken to identify a linked marker locus suitable for indirect selection of Rrs14. Based on linkage to a set of previously mapped loci, Rrs14 was positioned to barley chromosome 1H between the seed storage protein (hordein) loci Hor1 and Hor2, approximately 1.8 cM from the latter locus. The Hor2 locus is thus an ideal codominant molecular marker for Rrs14. The tight linkage between Rrs14 and Hor2 and the availability of alternative biochemical and molecular techniques for scoring Hor2 genotypes, permits simple indirect selection of Rrs14 in barley scald resistance breeding programmes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2000.00456.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of combining scald resistance genes on disease levels, yield and quality traits in barley (1996)
    Springer
    Theoretical and applied genetics 93 (1996), S. 361-366 
    Details
    ISSN: 1432-2242
    Keywords: Key words Pyramiding  ;  Hordeum vulgare ssp. spontaneum  ;  Rhynchosporium secalis  ;  Backcross lines  ;   Isozyme marker genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pairwise combinations of genes for resistance to scald in barley were developed using linked isozyme markers to test whether such combinations conferred improved resistance to the pathogen, Rhynchosporium secalis. The resistance genes originally derived from Hordeum vulgare ssp. spontaneum. The combinations were bred into an essentially similar genetic background because the scald-susceptible, Australian barley cultivar ‘Clipper’ was the recurrent backcross parent in their ancestry. In field tests of the recombinants over 2 years, disease levels were lower in three of six doubly resistant lines than in backcross lines carrying a single resistance gene, which in turn were less diseased than either ‘Clipper’ or recombinants that lacked the marked resistance genes. All resistant lines significantly outyielded ‘Clipper’ but did not themselves differ significantly. Lines resistant to scald had significantly higher grain size and grain weight. Gains for malt yield of about 1% were detected in the higher disease environment. Resistance was not accompanied by any obvious “cost” in terms of yield or quality. Protection against scald is therefore a significant requirement for new malting barley cultivars in scald-prone areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050289
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The effect of combining scald resistance genes on disease levels, yield and quality traits in barley (1996)
    Springer
    Theoretical and applied genetics 93 (1996), S. 361-366 
    Details
    ISSN: 1432-2242
    Keywords: Pyramiding ; Hordeum vulgare ssp ; spontaneum ; Rhynchosporium secalis ; Backcross lines ; Isozyme marker genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pairwise combinations of genes for resistance to scald in barley were developed using linked isozyme markers to test whether such combinations conferred improved resistance to the pathogen, Rhynchosporium secalis. The resistance genes originally derived from Hordeum vulgare ssp. spontaneum. The combinations were bred into an essentially similar genetic background because the scald-susceptible, Australian barley cultivar ‘Clipper’ was the recurrent backcross parent in their ancestry. In field tests of the recombinants over 2 years, disease levels were lower in three of six doubly resistant lines than in backcross lines carrying a single resistance gene, which in turn were less diseased than either ‘Clipper’ or recombinants that lacked the marked resistance genes. All resistant lines significantly outyielded ‘Clipper’ but did not themselves differ significantly. Lines resistant to scald had significantly higher grain size and grain weight. Gains for malt yield of about 1 % were detected in the higher disease environment. Resistance was not accompanied by any obvious “cost” in terms of yield or quality. Protection against scald is therefore a significant requirement for new malting barley cultivars in scald-prone areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223177
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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