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Genetic diversity of Phytophthora infestans in the Northern-Andean region

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dc.contributor.author Cardenas, Martha en
dc.contributor.author Grajales, Alejandro en
dc.contributor.author Sierra, Roberto en
dc.contributor.author Rojas, Alejandro en
dc.contributor.author Gonzalez-Almario, Adriana en
dc.contributor.author Vargas, Angela en
dc.contributor.author Marin, Mauricio en
dc.contributor.author Fermin, Gustavo en
dc.contributor.author Lagos, Luz en
dc.contributor.author Grunwald, Niklaus en
dc.contributor.author Bernal, Adriana en
dc.contributor.author Salazar, Camilo A. en
dc.contributor.author Restrepo, Silvia en
dc.date.accessioned 2011-05-03T15:49:00Z
dc.date.available 2011-05-03T15:49:00Z
dc.date.issued 2011
dc.identifier.citation Cardenas, Martha, Grajales, Alejandro, Sierra, Roberto, Rojas, Alejandro, Gonzalez-Almario, Adriana, Vargas, Angela, Marin, Mauricio, Fermin, Gustavo, Lagos, Luz, Grunwald, Niklaus, Bernal, Adriana, Salazar, Camilo A., and Restrepo, Silvia. 2011. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F16144">Genetic diversity of Phytophthora infestans in the Northern-Andean region</a>." <em>BMC Genetics</em>. 12 (1):23. <a href="https://doi.org/10.1186/1471-2156-12-23">https://doi.org/10.1186/1471-2156-12-23</a> en
dc.identifier.issn 1471-2156
dc.identifier.uri http://hdl.handle.net/10088/16144
dc.description.abstract BACKGROUND:Phytophthora infestans (Mont.) de Bary, the causal agent of potato late blight, is responsible for tremendous crop losses worldwide. Countries in the northern part of the Andes dedicate a large proportion of the highlands to the production of potato, and more recently, solanaceous fruits such as cape gooseberry (Physalis peruviana) and tree tomato (Solanum betaceum), all of which are hosts of this oomycete. In the Andean region, P. infestans populations have been well-characterized in Ecuador and Peru, but are poorly understood in Colombia and Venezuela. To understand the P. infestans population structure in the Northern part of the Andes, four nuclear regions (ITS, Ras, beta-tubulin and Avr3a) and one mitochondrial (Cox1) region were analyzed in isolates of P. infestans sampled from different hosts in Colombia and Venezuela. RESULTS:Low genetic diversity was found within this sample of P. infestans isolates from crops within several regions of Colombia and Venezuela, revealing the presence of clonal populations of the pathogen in this region. We detected low frequency heterozygotes, and their distribution patterns might be a consequence of a high migration rate among populations with poor effective gene flow. Consistent genetic differentiation exists among isolates from different regions. CONCLUSIONS:The results here suggest that in the Northern Andean region P. infestans is a clonal population with some within-clone variation. P. infestans populations in Venezuela reflect historic isolation that is being reinforced by a recent self-sufficiency of potato seeds. In summary, the P. infestans population is mainly shaped by migration and probably by the appearance of variants of key effectors such as Avr3a. en
dc.relation.ispartof BMC Genetics en
dc.title Genetic diversity of Phytophthora infestans in the Northern-Andean region en
dc.type Journal Article en
dc.identifier.srbnumber 98425
dc.identifier.doi 10.1186/1471-2156-12-23
rft.jtitle BMC Genetics
rft.volume 12
rft.issue 1
rft.spage 23
dc.description.SIUnit Peer-reviewed en
dc.description.SIUnit STRI en
dc.citation.spage 23

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