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Magnaporthe oryzae populations adapted to finger millet and rice exhibit distinctive patterns of genetic diversity, sexuality and host interaction

dc.contributor.authorTakan, J.P.
dc.contributor.authorChipili, J.
dc.contributor.authorMuthumeenakshi, S.
dc.contributor.authorTalbot, N.J.
dc.contributor.authorManyasa, E.O.
dc.contributor.authorBandyopadhyay, Ranajit
dc.contributor.authorSere, Y.
dc.contributor.authorNutsugah, S.K.
dc.contributor.authorTalhinhas, P.
dc.contributor.authorHossain, M.A.
dc.contributor.authorBrown, A.
dc.contributor.authorSreenivasaprasad, S.
dc.date.accessioned2019-12-04T11:07:43Z
dc.date.available2019-12-04T11:07:43Z
dc.date.issued2012
dc.identifier.citationTakan, J.P., Chipili, J., Muthumeenakshi, S., Talbot, N. J., Manyasa, E.O., Bandyopadhyay, R., ... & Sreenivasaprasad, S. (2012). Magnaporthe oryzae populations adapted to finger millet and rice exhibit distinctive patterns of genetic diversity, sexuality and host interaction. Molecular Biotechnology, 50(2), 145-158.
dc.identifier.issn1073-6085
dc.identifier.urihttps://hdl.handle.net/20.500.12478/1548
dc.description.abstractIn this study, host-specific forms of the blast pathogen Magnaporthe oryzae in sub-Saharan Africa (SSA) were characterised from distinct cropping locations using a combination of molecular and biological assays. Finger millet blast populations in East Africa revealed a continuous genetic variation pattern and lack of clonal lineages, with a wide range of haplotypes. M. oryzae populations lacked the grasshopper (grh) element (96%) and appeared distinct to those in Asia. An overall near equal distribution (47–53%) of the mating types MAT1-1 and MAT1-2, high fertility status (84–89%) and the dominance of hermaphrodites (64%) suggest a strong sexual reproductive potential. Differences in pathogen aggressiveness and lack of cultivar incompatibility suggest the importance of quantitative resistance. Rice blast populations in West Africa showed a typical lineage-based structure. Among the nine lineages identified, three comprised ~90% of the isolates. Skewed distribution of the mating types MAT1-1 (29%) and MAT1-2 (71%) was accompanied by low fertility. Clear differences in cultivar compatibility within and between lineages suggest R gene-mediated interactions. Distinctive patterns of genetic diversity, sexual reproductive potential and pathogenicity suggest adaptive divergence of host-specific forms of M. oryzae populations linked to crop domestication and agricultural intensification.
dc.description.sponsorshipDepartment for International Development, United Kingdom
dc.language.isoen
dc.subjectFinger Millet
dc.subjectRice
dc.subjectBlast Disease
dc.subjectMagnaporthe Oryzae
dc.subjectPathogen Populations
dc.subjectGenetic Variation
dc.subjectMating Type Distribution
dc.subjectFertility Status
dc.subjectPathogenicity
dc.subjectAdaptive Divergence
dc.titleMagnaporthe oryzae populations adapted to finger millet and rice exhibit distinctive patterns of genetic diversity, sexuality and host interaction
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpRice
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.affiliationUniversity of Warwick
cg.contributor.affiliationNaSARRI, Uganda
cg.contributor.affiliationMinistry of Agriculture, Zambia
cg.contributor.affiliationUniversity of Exeter
cg.contributor.affiliationInternational Crops Research Institute for the Semi-Arid Tropics
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationAfrica Rice Center
cg.contributor.affiliationQueen's University Belfast
cg.contributor.affiliationUniversity of Bedfordshire
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.regionEast Africa
cg.coverage.countryGhana
cg.coverage.countryNigeria
cg.coverage.countryKenya
cg.coverage.countryUganda
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectGenetic Improvement
cg.iitasubjectFood Security
cg.journalMolecular Biotechnology
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid82109
cg.identifier.doihttps://dx.doi.org/10.1007/s12033-011-9429-z


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