Using a hybrid mapping population to identify genomic regions of Pyrenophpra teres associated with virulence
Article
Article Title | Using a hybrid mapping population to identify genomic regions of Pyrenophpra teres associated with virulence |
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ERA Journal ID | 200524 |
Article Category | Article |
Authors | Martin, Anke (Author) and Dahanayaka, Buddhika (Author) |
Journal Title | Frontiers in Plant Science |
Journal Citation | 13, pp. 1-13 |
Article Number | 925107 |
Number of Pages | 13 |
Year | 2022 |
Publisher | Frontiers Media SA |
Place of Publication | Switzerland |
ISSN | 1664-462X |
Digital Object Identifier (DOI) | https://doi.org/10.3389/fpls.2022.925107 |
Web Address (URL) | https://www.frontiersin.org/articles/10.3389/fpls.2022.925107/full |
Abstract | Net blotches caused by Pyrenophora teres are important foliar fungal diseases of barley and result in significant yield losses of up to 40%. The two types of net blotch, net-form net blotch and spot-form net blotch, are caused by P. teres f. teres (Ptt) and P. teres f. maculata (Ptm), respectively. This study is the first to use a cross between Ptt and Ptm to identify quantitative trait loci (QTL) associated with virulence and leaf symptoms. A genetic map consisting of 1,965 Diversity Arrays Technology (DArT) markers was constructed using 351 progenies of the Ptt/Ptm cross. Eight barley cultivars showing differential reactions to the parental isolates were used to phenotype the hybrid progeny isolates. Five QTL associated with virulence and four QTL associated with leaf symptoms were identified across five linkage groups. Phenotypic variation explained by these QTL ranged from 6 to 16%. Further phenotyping of selected progeny isolates on 12 more barley cultivars revealed that three progeny isolates are moderately to highly virulent across these cultivars. The results of this study suggest that accumulation of QTL in hybrid isolates can result in enhanced virulence. |
Keywords | hybrids, quantitative trait loci, barley, candidate genes, leaf symptoms, net-form net blotch, spot-formnet blotch |
ANZSRC Field of Research 2020 | 300409. Crop and pasture protection (incl. pests, diseases and weeds) |
Byline Affiliations | Centre for Crop Health |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q77q5/using-a-hybrid-mapping-population-to-identify-genomic-regions-of-pyrenophpra-teres-associated-with-virulence
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