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Evidence and Consequence of a Highly Adapted Clonal Haplotype within the Australian Ascochyta rabiei Population

Mehmood, Yasir; Sambasivam, Prabhakaran; Kaur, Sukhjiwan; Davidson, Jenny; Leo, Audrey E.; Hobson, Kristy; Linde, Celeste; Moore, Kevin; Brownlie, Jeremy; Ford, Rebecca

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The Australian Ascochyta rabiei (Pass.) Labr. (syn. Phoma rabiei) population has low genotypic diversity with only one mating type detected to date, potentially precluding substantial evolution through recombination. However, a large diversity in aggressiveness exists. In an effort to better understand the risk from selective adaptation to currently used resistance sources and chemical control strategies, the population was examined in detail. For this, a total of 598 isolates were...[Show more]

dc.contributor.authorMehmood, Yasir
dc.contributor.authorSambasivam, Prabhakaran
dc.contributor.authorKaur, Sukhjiwan
dc.contributor.authorDavidson, Jenny
dc.contributor.authorLeo, Audrey E.
dc.contributor.authorHobson, Kristy
dc.contributor.authorLinde, Celeste
dc.contributor.authorMoore, Kevin
dc.contributor.authorBrownlie, Jeremy
dc.contributor.authorFord, Rebecca
dc.date.accessioned2021-06-17T00:06:43Z
dc.date.available2021-06-17T00:06:43Z
dc.identifier.issn1664-462X
dc.identifier.urihttp://hdl.handle.net/1885/237767
dc.description.abstractThe Australian Ascochyta rabiei (Pass.) Labr. (syn. Phoma rabiei) population has low genotypic diversity with only one mating type detected to date, potentially precluding substantial evolution through recombination. However, a large diversity in aggressiveness exists. In an effort to better understand the risk from selective adaptation to currently used resistance sources and chemical control strategies, the population was examined in detail. For this, a total of 598 isolates were quasi-hierarchically sampled between 2013 and 2015 across all major Australian chickpea growing regions and commonly grown host genotypes. Although a large number of haplotypes were identified (66) through short sequence repeat (SSR) genotyping, overall low gene diversity (Hexp = 0.066) and genotypic diversity (D = 0.57) was detected. Almost 70% of the isolates assessed were of a single dominant haplotype (ARH01). Disease screening on a differential host set, including three commonly deployed resistance sources, revealed distinct aggressiveness among the isolates, with 17% of all isolates identified as highly aggressive. Almost 75% of these were of the ARH01 haplotype. A similar pattern was observed at the host level, with 46% of all isolates collected from the commonly grown host genotype Genesis090 (classified as “resistant” during the term of collection) identified as highly aggressive. Of these, 63% belonged to the ARH01 haplotype. In conclusion, the ARH01 haplotype represents a significant risk to the Australian chickpea industry, being not only widely adapted to the diverse agro-geographical environments of the Australian chickpea growing regions, but also containing a disproportionately large number of aggressive isolates, indicating fitness to survive and replicate on the best resistance sources in the Australian germplasm.
dc.description.sponsorshipThe research was funded by the Grains Research and Development Cooperation within project UM00052.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherFrontiers Research Foundation
dc.rights© 2017 Mehmood, Sambasivam, Kaur, Davidson, Leo, Hobson, Linde, Moore, Brownlie and Ford.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceFrontiers in Plant Science
dc.subjectchickpea
dc.subjectAscochyta rabiei
dc.subjectresistance sources
dc.subjectSSR genotype
dc.subjecthaplotype and highly aggressive
dc.titleEvidence and Consequence of a Highly Adapted Clonal Haplotype within the Australian Ascochyta rabiei Population
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume8
dc.date.issued2017
local.identifier.absfor060302 - Biogeography and Phylogeography
local.identifier.absfor060411 - Population, Ecological and Evolutionary Genetics
local.identifier.ariespublicationu9511635xPUB1667
local.publisher.urlhttp://frontiersin.org/Plant_Science
local.type.statusPublished Version
local.contributor.affiliationMehmood, Yasir, Griffith University
local.contributor.affiliationSambasivam, Prabhakaran, Griffith University
local.contributor.affiliationKaur, Sukhjiwan, Agriculture Victoria
local.contributor.affiliationDavidson, Jenny, South Australian Research and Development Institute
local.contributor.affiliationLeo, Audrey E., Wagga Wagga Agricultural Institute
local.contributor.affiliationHobson, Kristy, Tamworth Agricultural Institute
local.contributor.affiliationLinde, Celeste, College of Science, ANU
local.contributor.affiliationMoore, Kevin, Tamworth Agricultural Institute
local.contributor.affiliationBrownlie, Jeremy, Griffith University
local.contributor.affiliationFord, Rebecca, Griffith University
local.bibliographicCitation.issue1029
local.bibliographicCitation.startpage1029
local.bibliographicCitation.lastpage1029
local.identifier.doi10.3389/fpls.2017.01029
local.identifier.absseo820499 - Summer Grains and Oilseeds not elsewhere classified
dc.date.updated2020-11-23T10:30:38Z
local.identifier.scopusID2-s2.0-85021145235
local.identifier.thomsonID000403487300002
dcterms.accessRightsOpen Access
dc.provenanceThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.rights.licenseCreative Commons Attribution License (CC BY)
CollectionsANU Research Publications

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