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  • 1
    Electronic Resource
    Electronic Resource
    Transfer of PLRV resistance fromSolanum verrucosum Schlechdt to potato (S. tuberosum L.) by protoplast electrofusion (2000)
    Springer
    Potato research 43 (2000), S. 31-42 
    Details
    ISSN: 1871-4528
    Keywords: somatic hybrids ; potato leafroll virus ; RAPD ; Solanum wild species ; pollen fertility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Somatic fusions between an accession of the diploid wild speciesSolanum verrucosum and a dihaploid S.tuberosum genotype were produced in order to incorporate resistance to potato leafroll virus (PLRV). In total 15 somatic hybrids out of 16 regenerants were obtained. Identification of hybrids was based on additive RAPD patterns, general morphological characteristics, chromosome numbers and chloroplast counts in stomata guard cells. A field trial was performed with the hybrids, their two parents and the control cultivar Kennebec to assess field performance and phenotypic variability. Yield parameters varied considerably among somatic hybrids. Some of the hybrids gave significantly higher yields, tuber numbers and tuber weights than both parents. Pollen fertility of hybrids ranged from 19 to 77%. Twelve hybrids were found to be resistant to PLRV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02358511
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  • 2
    Electronic Resource
    Electronic Resource
    WildSolanum species as resistance sources against different pathogens of potato (1998)
    Springer
    Potato research 41 (1998), S. 57-68 
    Details
    ISSN: 1871-4528
    Keywords: virus ; late blight ; cyst nematodes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Resistance screenings againstPhytophthora infestans, Globodera pallida Pa2/3 and the viruses PVYN, PLRV, PVM and PVS were performed in 98 accessions belonging to 90Solanum wild species. Seventy accessions showed resistance or partial resistance to one or several of these pathogens. Among themS. brachistotrichum exhibited combined resistance to nematodes, late blight and some of the viruses evaluated. Only part of the resistances previously found in different wild species could be confirmed, which might be due to the existing variability within species, the use of different pathogen strains or isolates, or to different methodologies for resistance screening. Several new resistance sources, such asS. andreanum, S. maglia. S. doddsii andS. boliviense, are provided for the different pathogens analyzed. These findings demonstrate that within the gene pool ofSolanum species, still numerous but in part unexploited resistances are available which could be favourably used in potato breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02360262
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