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    Verticillium dahliae disease resistance and the regulatory pathway for maturity and tuberization in potato

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    S17ArtTaiVerticilliumInthomDev.pdf (194.9Kb)
    Date
    2017
    Author
    Tai, H.H.
    Koeyer, D. de
    Sønderkær, M.
    Hedegaard, S.
    Lagüe, M.
    Goyer, C.
    Nolan, L.
    Davidson, C.
    Gardner, K.
    Neilson, J
    Paudel, J.R.
    Murphy, A.
    Bizimungu, B.
    Wang, H.Y.
    Xiong, X.
    Halterman, D.
    Nielsen, K.L.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Verticillium dahliae Kleb. is a pathogenic fungus causing wilting, chlorosis and early dying in potato. Genetic mapping of resistance to V. dahliae was done using a diploid population of potato. The major quantitative trait locus (QTL) for Verticillium resistance was found on chromosome 5. The StCDF1 gene controlling earliness of maturity and tuberization was mapped within the interval. Another QTL on chromosome 9 co-localised with the Ve2 Verticillium wilt resistance gene marker. Epistasis analysis indicated that the loci on chromosomes 5 and 9 had a highly significant interaction, and that StCDF1 functioned downstream of Ve2. The StCDF1 alleles were sequenced and found to encode StCDF1.1 and StCDF1.3. Interaction between the Ve2 resistance allele and the StCDF1.3 was demonstrated, but not for StCDF1.1. Genome-wide expression QTL (eQTL) analysis was carried out and genes with eQTL at the StCDF1 and Ve2 loci were both found to have similar functions involving the chloroplast, including photosynthesis, which declines in both maturity and Verticillium wilt. Among the GO terms that were specific to genes with eQTL at the Ve2, but not the StCDF1 locus, were those associated with fungal defense. These results suggest that Ve2 controls fungal defense and reduces early dying in Verticillium wilt through affecting genetic pathway controlling tuberization timing.
    http://dx.doi.org/10.3835/plantgenome2017.05.0040
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2397
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.3835/plantgenome2017.05.0040
    Research Themes
    BIOTECH & PLANT BREEDING
    IITA Subjects
    Genetic Improvement; Plant Breeding; Plant Diseases; Plant Ecology; Plant Production
    Agrovoc Terms
    Crop; Genetics; Plant Diseases; Potato; Verticillium
    Regions
    Acp; North America
    Countries
    Canada
    Journals
    Plant Genome
    Collections
    • Journal and Journal Articles4835
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