<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1659-1321</journal-id>
<journal-title><![CDATA[Agronomía Mesoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Mesoam]]></abbrev-journal-title>
<issn>1659-1321</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-13212020000300530</article-id>
<article-id pub-id-type="doi">10.15517/am.v31i3.38733</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Identificación morfológica, morfométrica y molecular de Meloidogyne exigua (Göeldi 1887) en café (Coffea arabica)]]></article-title>
<article-title xml:lang="en"><![CDATA[Morphological, morphometric and molecular identification of Meloidogyne exigua (Göeldi 1887) in coffee (Coffea arabica)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Artavia-Carmona]]></surname>
<given-names><![CDATA[Roy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peraza-Padilla]]></surname>
<given-names><![CDATA[Walter]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>31</volume>
<numero>3</numero>
<fpage>530</fpage>
<lpage>544</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212020000300530&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212020000300530&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212020000300530&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción. El género Meloidogyne contiene muchas especies y el diagnóstico correcto de estas debe basarse en el uso de múltiples herramientas, mismas que en laboratorios de diagnóstico permiten una evaluación correcta y confiable, especialmente cuando podría tratarse de nematodos cuarentenarios. La identificación adecuada de un fitonematodo es importante no solo para establecer una apropiada estrategia de control, sino que también para evitar su diseminación a otras áreas donde podría provocar daños que se traducirían en pérdidas económicas. Objetivo. Realizar estudios taxonómicos y moleculares para confirmar la especie de Meloidogyne, asociada a una plantación de café en la localidad de San Pedro de Barva, Heredia. Materiales y métodos. Se recolectaron muestras de suelo y raíz en una plantación de café ubicada en Barva, Heredia, Costa Rica, las cuales se procesaron en el laboratorio de Nematología de la Escuela de Ciencias Agrarias de la Universidad Nacional (UNA), por el método centrifugación-flotación en solución azucarada y técnicas moleculares. Resultados. En promedio se contabilizaron 30 J2 en 100 cc-1 en suelo y 1000 J2 en 10 g-1 de raíces del nematodo agallador. Tanto las técnicas taxonómicas como moleculares permitieron identificar que las hembras y juveniles extraídos de raíces de café correspondieron a Meloidogyne exigua. El análisis de las secuencias generadas mediante PCR y el uso de la enzima Dral confirmaron la identidad de la especie con un 99 % de similitud al compararla con secuencias de Costa Rica y Nicaragua, reportadas en el Genbank. Conclusión. Mediante el uso de diferentes técnicas morfométricas y moleculares se identificó a M. exigua asociada a una plantación de café.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction. The genus Meloidogyne contains many species and their correct diagnosis of these must be based on the use of multiple tools, which in diagnostic laboratories allow a correct and reliable evaluation, specially for quarantine nematodes. The proper identification of a phytonematode is important not only to establish an appropriate control strategy, but also to avoid its spread to other areas where it could cause damage that would result in economic losses. Objective. To perform taxonomic and molecular studies to confirm the Meloidogyne species, associated to a coffee plantation located in Barva, Heredia. Materials and methods. Soil and root samples were collected in a coffee plantation located in Barva, Heredia, Costa Rica, which were processed in the Nematology laboratory of the School of Agricultural Sciences at the Universidad Nacional (UNA), using the centrifugation-flotation method in sugary solution and molecular techniques. Results. On average, 30 J2 100 cc-1 were counted in soil and 1000 J2 10 g-1 of roots of the root-knot nematode. Taxonomic and molecular techniques allowed to identify that the females and juveniles extracted from coffee roots corresponded to Meloidogyne exigua. Analysis of the sequences generated by PCR and the use of the DraI enzyme confirmed the identity of the species with 99 % similarity when compared to sequences from Costa Rica and Nicaragua, reported in the Genbank. Conclusion. Using different morphometric and molecular techniques, M. exigua associated with a coffee plantation was identified.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Coffea arabica]]></kwd>
<kwd lng="es"><![CDATA[nematodo agallador]]></kwd>
<kwd lng="es"><![CDATA[identificación]]></kwd>
<kwd lng="es"><![CDATA[análisis molecular]]></kwd>
<kwd lng="en"><![CDATA[Coffea arabica]]></kwd>
<kwd lng="en"><![CDATA[root-knot nematode]]></kwd>
<kwd lng="en"><![CDATA[identification]]></kwd>
<kwd lng="en"><![CDATA[molecular analysis]]></kwd>
</kwd-group>
</article-meta>
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<given-names><![CDATA[P]]></given-names>
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<name>
<surname><![CDATA[Meng]]></surname>
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<name>
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<article-title xml:lang=""><![CDATA[Characterization of Meloidogyne species from China using isoenzyme, phenotypes and amplified mitochondrial DNA restriction fragments length polymorphism.]]></article-title>
<source><![CDATA[Eur. J. Plant Phathol.]]></source>
<year>2004</year>
<volume>110</volume>
<page-range>309-15</page-range></nlm-citation>
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</article>
