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  • 1
    Electronic Resource
    Electronic Resource
    Introgression of the Vf source of scab resistance and distribution of linked marker alleles within the Malus gene pool (1999)
    Springer
    Theoretical and applied genetics 99 (1999), S. 1039-1046 
    Details
    ISSN: 1432-2242
    Keywords: Key words Apple ; Scab resistance ; Introgression ; Vf gene ; DNA markers ; Linkage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  A chromosomal region originating from Malus floribunda 821 confers Vf scab resistance to many isolates of Venturia inaequalis. Twelve DNA markers located in this region were used to scan the equivalent of 31 cM in 98 Malus accessions. This allowed a molecular diagnosis of a source of resistance in apple germplasm with the aid of pedigree information, and in the context of a limited marker survey representing other chromosomes. At least five marker alleles were present in all scab-resistant breeding selections or varieties arising from M. floribunda. The validity of findings based on RAPD markers was confirmed with SCAR assays and Southern-hybridisation experiments. The order of markers determined in previous mapping studies was confirmed and sets of recombinants identified that establish reliable fine-mapping orders within 0.7 cM of the resistance locus. None of the marker alleles were present in the accessions that are either susceptible or possess weak polygenic resistance to scab. The presence of some alleles corresponding to those present at least 5.3 cM from Vf in M. floribunda was detected in some accessions. Other major sources of scab resistance do not appear to possess alleles in common with the Vf region, which will simplify future allelism tests. The results are discussed in the context of the introgression of resistance loci together with marker-assisted selection. The use of breeding pedigrees to assist in fine-scale mapping and map-based cloning is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051412
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  • 2
    Electronic Resource
    Electronic Resource
    Sequential assignments in uniformly 13C- and 15N-labelled RNAs: The HC(N,P) and HC(N,P)-CCH-TOCSY experiments (1996)
    Springer
    Journal of biomolecular NMR 7 (1996), S. 251-255 
    Details
    ISSN: 1573-5001
    Keywords: RNA ; Heteronuclear NMR ; Sequential assignment ; Simultaneous acquisition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary An approach for the simultaneous acquisition of HCN and HCP as well as HCN-CCH-TOCSY and HCP-CCH-TOCSY triple resonance data sets for 13C-/15N-labelled RNAs is presented. The new HCN-CCH-TOCSY scheme unambiguously links all sugar resonances to the base nitrogen. In addition, simultaneous acquisition of HCN-CCH-TOCSY and HCP-CCH-TOCSY data sets provides sequential and base-type information in a single experiment, thereby saving data acquisition time as well as providing complementary data sets that are useful in clarifying ambiguous assignments. Virtually complete sequence-specific phosphate-ribose 1H, 31P, and base 15N1,9 assignments as well as partial 13C assignments could be obtained in a single experiment for a 0.5-mM sample of a 19-mer ribonucleotide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00202042
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    Paper (German National Licenses)
    Fulltext
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