The response of Brassica hosts to multiple isolates of Sclerotinia sclerotiorum

Xintian Ge

    Research output: ThesisDoctoral Thesis

    506 Downloads (Pure)

    Abstract

    [Truncated abstract] Sclerotinia stem rot (SSR) caused by the fungus Sclerotinia sclerotiorum is one of the most damaging and difficult-to-manage diseases of Brassicaceae crops. identifying Brassica genotypes with effective resistance offers the best long-term prospect for management of the disease. Despite some significant interactions between Brassica genotypes and S. sclerotiorum reported in earlier studies, in most cases only a single pathogen isolate has been used to identify resistant genotypes. This is a limitation because existing resistance can be broken down by the potential S. sclerotiorum variation regarding pathogenicity. Here, this limitation was addressed by determine the Brassica genotypes’ resistance profile by multiple Sclerotinia isolates.
    Selection of advanced breeding lines from Australia, China and India with resistance to different isolates of S. sclerotiorum is imperative for sustained control of the disease it causes. Here, 20 B. napus and B. juncea advanced breeding lines were screened against three S. sclerotiorum isolates. Significant variation was found in resistance, in the response to isolates and in breeding lines x isolates interactions. Line 6 (HZAU), Line 1 (HZAU) and Line 5 (HZAU) were identified as useful germplasm for future applications.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Publication statusUnpublished - 2013

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