Genetic variability within Phaeoisariopsis griseola from Central America and its implications for resistance breeding of common bean

cg.coverage.regionCentral America
cg.identifier.doihttps://doi.org/10.1046/j.1365-3059.2002.00742.xen
cg.isijournalISI Journalen
cg.issn1365-3059en
cg.issue5en
cg.journalPlant Pathologyen
cg.reviewStatusPeer Reviewen
cg.subject.ciatBEANSen
cg.subject.ciatGENETIC RESOURCESen
cg.subject.ciatPESTS AND DISEASESen
cg.subject.ciatPLANT BREEDINGen
cg.volume51en
dc.contributor.authorMahuku, George S.en
dc.contributor.authorJara, Carlos E.en
dc.contributor.authorCuásquer, Juan B.en
dc.contributor.authorCastellanos, G.en
dc.date.accessioned2014-09-24T07:58:45Zen
dc.date.available2014-09-24T07:58:45Zen
dc.identifier.urihttps://hdl.handle.net/10568/42907
dc.titleGenetic variability within Phaeoisariopsis griseola from Central America and its implications for resistance breeding of common beanen
dcterms.abstractThe genetic and virulence variability of 112 isolates of Phaeoisariopsis griseola, collected from various locations in Central America, were studied using seven random amplified polymorphic DNA (RAPD) primers and 12 common-bean differential genotypes. Broad molecular diversity (H = 0·92) among isolates was found using RAPD markers. Fifty pathotypes were identified on 12 differential bean genotypes, 29 of which were represented by only one isolate. Only 18 pathotypes were found in two or more countries. Pathotype 63-63 was the most virulent and caused leaf spots on all 12 common-bean differential genotypes. Comparison of virulence phenotypes and RAPD profiles to known Andean P. griseola isolates confirmed that all isolates belonged to the Mesoamerican group. Pairwise comparison between individual RAPD loci showed that the majority were in gametic phase linkage disequilibrium, revealing that P. griseola maintains a genetic structure that is consistent with asexual reproduction. The molecular and virulence diversities of P. griseola isolates from Central America imply that using single resistance genes to manage angular leaf spot is inadequate and stacking resistance genes may be necessary to manage the disease effectively.en
dcterms.accessRightsOpen Access
dcterms.available2002-10-04
dcterms.extentpp. 594-604en
dcterms.issued2002-10
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherWileyen
dcterms.subjectphaseolus vulgarisen
dcterms.subjectphaeoisariopsis griseolaen
dcterms.subjectgenetic variationen
dcterms.subjectrapden
dcterms.subjectpathogenicityen
dcterms.subjectvariación genéticaen
dcterms.subjectpatogenicidaden
dcterms.typeJournal Article

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