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  • 1
    Electronic Resource
    Electronic Resource
    Solidification Simulation of Equiaxed Grains in Al - Si Eutectic Alloys (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 217-222 (May 1996), p. 347-352 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/01/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.217-222.347.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic localisation of transformation competence in diploid potato (1995)
    Springer
    Theoretical and applied genetics 91 (1995), S. 557-562 
    Details
    ISSN: 1432-2242
    Keywords: Solanum tuberosum ; Phytophthora infestans ; Transposable element ; Transformation competence ; Linkage analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In the course of improving diploid potato genotypes for transformation ability, selection for specific components affecting regeneration and transformation was carried out. From a segregating population between two good regenerating clones a selection was made to yield an optimal well-transforming and fertile genotype J92-6400-A16. This plant yielded predominantly diploid transformants and was heterozygous for the gene R1, conferring resistance to Phytophthora infestans. The speed of, and competence for, regeneration and transformation on both sides of the stem explant were improved. A competence factor for tranformation was found to be linked with the R1 locus and a molecular marker on chromosome 5. The male fertility of transformants was frequently decreased to a great extent, whereas female fertility was not so markedly affected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223279
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  • 3
    Electronic Resource
    Electronic Resource
    R6 and R7 alleles of potato conferring race-specific resistance to Phytophthora infestans (Mont.) de Bary identified genetic loci clustering with the R3 locus on chromosome XI (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 880-884 
    Details
    ISSN: 1432-2242
    Keywords: Solanum tuberosum ; P. infestans ; Resistance ; Dihaploid induction ; RFLP mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In potato, 11 resistance alleles (R1–R11) are known which confer race-specific resistance to the fungus Phytophthora infestans. R1 has been mapped previously to potato chromosome V and R3 to chromosome XI. Here we report on the localization of the R6 and R7 alleles on the genetic map of potato. Differential resistant strains of tetraploid Solanum tuberosum, clones MaR6 and MaR7, were used as parental plants for the parthenogenetic induction and selection of diploid genotypes containing the R6 or the R7 resistance allele to P. infestans. One resistant dihaploid from MaR7 could be used directly as a parent to produce diploid F1 progeny suitable for phenotypic and RFLP analysis. MaR6 did not produce useful dihaploids directly. After crossing MaR6 with a tetraploid susceptible genotype, resistant F1 clones were selected. The resistant genotypes were then used as parents for the induction of dihaploids. Six dihaploids bearing R6 were identified that could be crossed with a diploid susceptible genotype. Two diploid F1 populations, segregating for R6 and R7, respectively, were analysed with RFLP markers known to be linked with previously identified R genes. Markers linked with R3 were found also to be linked with R6 and R7. The resistance alleles R6 and R7 mapped to a similar distal position on chromosome XI as the R3 allele.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221901
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  • 4
    Electronic Resource
    Electronic Resource
    R6 and R7 alleles of potato conferring race-specific resistance to Phytophthora infestans (Mont.) de Bary identified genetic loci clustering with the R3 locus on chromosome XI (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 880-884 
    Details
    ISSN: 1432-2242
    Keywords: Key words  Solanum tuberosum  ;  P. infestans  ;  Resistance  ;  Dihaploid induction  ;  RFLP mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract   In potato, 11 resistance alleles (R1–R11) are known which confer race-specific resistance to the fungus Phytophthora infestans. R1 has been mapped previously to potato chromosome V and R3 to chromosome XI. Here we report on the localization of the R6 and R7 alleles on the genetic map of potato. Differential resistant strains of tetraploid Solanum tuberosum, clones MaR6 and MaR7, were used as parental plants for the parthenogenetic induction and selection of diploid genotypes containing the R6 or the R7 resistance allele to P. infestans. One resistant dihaploid from MaR7 could be used directly as a parent to produce diploid F1 progeny suitable for phenotypic and RFLP analysis. MaR6 did not produce useful dihaploids directly. After crossing MaR6 with a tetraploid susceptible genotype, resistant F1 clones were selected. The resistant genotypes were then used as parents for the induction of dihaploids. Six dihaploids bearing R6 were identified that could be crossed with a diploid susceptible genotype. Two diploid F1 populations, segregating for R6 and R7, respectively, were analysed with RFLP markers known to be linked with previously identified R genes. Markers linked with R3 were found also to be linked with R6 and R7. The resistance alleles R6 and R7 mapped to a similar distal position on chromosome XI as the R3 allele.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050206
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  • 5
    Electronic Resource
    Electronic Resource
    A genetic map of potato (Solanum tuberosum) integrating molecular markers, including transposons, and classical markers (1995)
    Springer
    Theoretical and applied genetics 91 (1995), S. 289-300 
    Details
    ISSN: 1432-2242
    Keywords: Morphological markers ; Isozymes ; Non-inbred species ; Combined map ; JoinMap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A genetic map of potato (Solanum tuberosum L.) integrating molecular markers with morphological and isozyme markers was constructed using a backcross population of 67 diploid potato plants. A general method for map construction is described that differs from previous methods employed in potato and other outbreeding plants. First, separate maps for the female and male parents were constructed. The female map contained 132 markers, whereas the male map contained 138 markers. Second, on the basis of the markers in common the two integrated parental maps were combined into one with the computer programme JoinMap. This combined map consisted of 175 molecular markers, 10 morphological markers and 8 isozyme markers. Ninety-two of the molecular markers were derived from DNA sequences flanking either T-DNA inserts in potato or reintegrated maize transposable elements originating from these T-DNA constructs. Clusters of distorted segregation were found on chromosomes 1,2,8 and 11 for the male parent and chromosome 5 for both parents. The total length of the combined map is 1120 cM.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220891
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  • 6
    Electronic Resource
    Electronic Resource
    Race specific resistance against Phytophthora infestans in potato is controlled by more genetic factors than only R-genes (1996)
    Springer
    Euphytica 90 (1996), S. 331-336 
    Details
    ISSN: 1573-5060
    Keywords: potato ; Solanum tuberosum ; Phytophthora infestans ; R-genes ; suppressor ; late blight
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary For RFLP mapping of R-genes, determining resistance to specific races of Phytophthora infestans in tetraploid potato, it is necessary to develop well segregating populations at the 2x level. During mapping studies, evidence was obtained that more genetic factor(s) are involved in the expression of R-genes than conventionally believed. Two experiments are described in which such an additional genetic factor was suppressing or enhancing the expression of unknown R nand R ifactors. R nand R iappeared to be present in the investigated plant material, containing R4 and R10, or in one of the susceptible crossing parents. In a third experiment, the expression and the segregation of the well known R1 gene was influenced by an additional genetic factor. In that case there were indications for a dominant suppressor. This was established by the selection of susceptible plants carrying a RFLP allele of probe GP21 closely linked to R1. In three of the four F1 populations, resulting from crosses between such susceptible plants and susceptible tester plants, resistnat progenies were found. The resistance appeared to be R1-specific. This clearly indicates that in three of the four investigated susceptible plants, the R1 gene was still present but not expressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027484
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