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    Identification of QTLs associated with resistance to Phomopsis pod blight (Diaporthe toxica) in Lupinus albus

    199709_127451_64_83.pdf (519.4Kb)
    Access Status
    Open access
    Authors
    Cowley, R.
    Luckett, D.
    Ash, G.
    Harper, J.
    Vipin, C.
    Raman, H.
    Ellwood, Simon
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Cowley, R. and Luckett, D. and Ash, G. and Harper, J. and Vipin, C. and Raman, H. and Ellwood, S. 2014. Identification of QTLs associated with resistance to Phomopsis pod blight (Diaporthe toxica) in Lupinus albus. Breeding Science. 64 (1): pp. 83-89.
    Source Title
    Breeding Science
    DOI
    10.1270/jsbbs.64.83
    Additional URLs
    https://www.jstage.jst.go.jp/article/jsbbs/64/1/64_83/_article
    ISSN
    1344-7610
    URI
    http://hdl.handle.net/20.500.11937/6365
    Collection
    • Curtin Research Publications
    Abstract

    Phomopsis blight in Lupinus albus is caused by a fungal pathogen, Diaporthe toxica. It can invade all plant parts, leading to plant material becoming toxic to grazing animals, and potentially resulting in lupinosis. Identifying sources of resistance and breeding for resistance remains the best strategy for controlling Phomopsis and reducing lupinosis risks. However, loci associated with resistance to Phomopsis blight have not yet been identified. In this study, quantitative trait locus (QTL) analysis identified genomic regions associated with resistance to Phomopsis pod blight (PPB) using a linkage map of L. albus constructed previously from an F8 recombinant inbred line population derived from a cross between Kiev-Mutant (susceptible to PPB) and P27174 (resistant to PPB). Phenotyping was undertaken using a detached pod assay. In total, we identified eight QTLs for resistance to PPB on linkage group (LG) 3, LG6, LG10, LG12, LG17 and LG27 from different phenotyping environments. However, at least one QTL, QTL-5 on LG10 was consistently detected in both phenotyping environments and accounted for up to 28.2% of the total phenotypic variance. The results of this study showed that the QTL-2 on LG3 interacts epistatically with QTL-5 and QTL-6, which map on LG10 and LG12, respectively.

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