Discovery of resistance to Pratylenchus neglectus among P. thornei-resistant Iranian landrace wheats and the introgression of both resistances into advanced breeding lines
Article
Article Title | Discovery of resistance to Pratylenchus neglectus among P. thornei-resistant Iranian landrace wheats and the introgression of both resistances into advanced breeding lines |
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ERA Journal ID | 2652 |
Article Category | Article |
Authors | Sheedy, Jason G. (Author), Lin, Jing (Author) and Thompson, John P. (Author) |
Journal Title | Plant Pathology |
Journal Citation | 71 (9), pp. 2017-2028 |
Number of Pages | 12 |
Year | 2022 |
Publisher | John Wiley & Sons |
Place of Publication | United Kingdom |
ISSN | 0032-0862 |
1365-3059 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/ppa.13616 |
Web Address (URL) | https://bsppjournals.onlinelibrary.wiley.com/doi/full/10.1111/ppa.13616 |
Abstract | Root-lesion nematodes (RLNs) Pratylenchus thornei and P. neglectus are globally important pathogens of cereal and pulse crops. These RLNs can occur together in farming systems and must be managed concurrently to minimize substantial yield losses in intolerant crop cultivars. Australian wheat cultivars with resistance to P. neglectus, have either the Rlnn1 resistance gene, which provides a high level of resistance but is linked with yellow flour colour that reduces cultivar marketability for bread production, or QRlnn.lrc-2B, which provides moderate resistance. We evaluated a collection of 91 P. thornei-resistant Iranian landrace wheats (ILWs) for their resistance to P. neglectus in four glasshouse experiments to (a) identify genotypes with resistance to both RLNs, (b) determine if any genotypes carried Rlnn1 and/or QRlnn.lrc-2B and (c) develop ILW-derived advanced breeding lines (ABLs) with resistance to both RLNs. A factor analytic linear mixed model (FA-1) that explained 70% of the genetic variation, where the genetic correlations between the experiments ranged from 0.54 to 0.77, was used for the combined analysis of all experiments. Seven P. neglectus-resistant genotypes were identified, with five that had potentially novel resistance. Subsequently, six breeding lines that were resistant to both RLNs were developed by crossing six ILWs with Australian cultivars and selecting for resistance in each generation. Both the ILWs and ABLs will be valuable genetic resources for wheat breeders to develop cultivars with dual resistance, enabling better management of mixed RLN populations with novel P. neglectus resistance that potentially is not linked with yellow flour colour. |
Keywords | Factor analytic linear mixed model; Nematode Resistance; Plant Breeding; Pratylenchus neglectus; Pratylenchus thornei; Triticum aestivum |
Related Output | |
Is part of | The identification of novel root-lesion nematode (Pratylenchus thornei & P. neglectus) resistances in Iranian landrace wheat (Triticum aestivum) and einkorn (T. monococcum) and their introgression into Australian wheat cultivars |
ANZSRC Field of Research 2020 | 310805. Plant pathology |
300406. Crop and pasture improvement (incl. selection and breeding) | |
Byline Affiliations | Centre for Crop Health |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q791z/discovery-of-resistance-to-pratylenchus-neglectus-among-p-thornei-resistant-iranian-landrace-wheats-and-the-introgression-of-both-resistances-into-advanced-breeding-lines
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Sheedy et al 2022 Discovery of resistance to Pratylenchus neglectus among P thornei‐resistant ILW.pdf | ||
License: CC BY-NC-ND 4.0 | ||
File access level: Anyone |
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