<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792020000500841</article-id>
<article-id pub-id-type="doi">10.28940/terra.v38i4.654</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Eficiencia en fijación biológica de nitrógeno de cepas de Rhizobium spp. recolectadas en frijol cultivado y silvestre]]></article-title>
<article-title xml:lang="en"><![CDATA[Biological nitrogen fixation efficiency in strains of Rhizobium spp. collected in cultivated and wild bean]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Alcocer]]></surname>
<given-names><![CDATA[José de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lépiz-Ildefonso]]></surname>
<given-names><![CDATA[Rogelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Eguiarte]]></surname>
<given-names><![CDATA[Diego Raymundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Macías]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Alcocer]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de Ciencias Biológicas y Agropecuarias ]]></institution>
<addr-line><![CDATA[Zapopan Jalisco]]></addr-line>
<country>Mexico</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>38</volume>
<numero>4</numero>
<fpage>841</fpage>
<lpage>852</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792020000500841&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792020000500841&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792020000500841&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se evaluó la eficiencia en fijación biológica de nitrógeno (FBN) de 27 cepas de Rhizobium spp. recolectadas en frijol silvestre y cultivado del occidente de México, al utilizar como hospedero la variedad de frijol Cuarenteño. El trabajo se realizó bajo malla sombra, se usó un diseño experimental completamente al azar con cinco repeticiones y se evaluaron longitud de vástago (LV) y de raíz (LR), peso seco de vástago (PSV) y de raíz (PSR), número de nódulos (NN) y peso seco de nódulos (PSN), nitrógeno total del vástago (NT) y contenido de clorofila (CL). Se realizaron análisis de varianza y de componentes principales; se obtuvieron índices de eficiencia por variable y por grupos de variables. Se detectaron diferencias altamente significativas (P &#8804; 0.01) en seis de las ocho variables registradas. Por el valor per se de las variables, se seleccionaron Rhizojal VC3 colectada en frijol silvestre y Rhizojal ZCB3, Rhizojal ZCB1, Rhizojal TP2 y Rhizojal TP3 obtenidas en frijol cultivado. Por índices de eficiencia simples y por grupos de variables, se escogieron Rhizojal VC3, Rhizojal ZCB3 y Rhizojal TP2. El análisis de componentes principales separó a la mayoría de las cepas en dos grupos: cepas procedentes de la forma silvestre de frijol y cepas colectadas en frijol cultivado. Las cepas Rhizojal ZCB3, Rhizojal TP2 y Rhizojal TP3, mostraron los mayores valores en la escala del CP1; la cepa Rhizojal VC3, se ubicó del lado de los aislados de origen cultivado. Considerando los análisis realizados, las cepas identificadas como mejores en FBN fueron Rhizojal VC3 de frijol silvestre y Rhizojal ZCB3 y Rhizojal TP2 de origen cultivado. Los resultados indican que los índices de eficiencia contribuyen a la evaluación y selección de cepas por FBN y que existe potencial para identificar cepas de Rhizobium eficientes en FBN en la región occidente de México.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: To assess efficiency in biological nitrogen fixation (BNF) of 27 Rhizobium spp. strains from plants of cultivated and wild bean from the western region of Mexico, a trial was conducted in mesh shade using a variety of bean Cuarenteño as host. A completely randomized experimental design was used with five replications and eight variables were recorded: stem length (SL) and root (RL), dry weight of stem (DSW) and root (DRW), number (NN) and dry weight of nodules (NDW), total nitrogen (TN) stem and chlorophyll content (CL). Analyses of variance and principal components were performed; efficiency indices were obtained by variable and groups of variables. Highly significant differences (P &#8804; 0.01) were detected in six of the eight variables recorded. By variable value per se, Rhizojal VC3 collected in wild bean and Rhizojal ZCB3, Rhizojal ZCB1, Rhizojal TP2 and Rhizojal TP3 obtained in cultivated beans were selected. Rhizojal VC3, Rhizojal ZCB3 and Rhizojal TP2 were chosen by simple and group variable efficiency indexes. The analysis of main components separated most of the strains into two groups: strains from wild bean and strains collected in cultivated beans. Strains Rhizojal ZCB3, Rhizojal TP2 and Rhizojal TP3 showed higher values on the scale of the CP1; strain Rhizojal VC3, stood on the side of cultivated origin isolates. Considering the analyses performed, the strains identified as best in BNF were Rhizojal VC3 of wild bean and Rhizojal ZCB3 and Rhizojal TP2 of cultivated origin. The results indicated that the efficiency indices contributed to strain evaluation and selection by BNF and that the potential exists to identify efficient Rhizobium strains in BNF in the western region of Mexico.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[componentes principales]]></kwd>
<kwd lng="es"><![CDATA[índices de eficiencia]]></kwd>
<kwd lng="es"><![CDATA[materia seca]]></kwd>
<kwd lng="es"><![CDATA[nodulación]]></kwd>
<kwd lng="es"><![CDATA[Phaseolus vulgaris L]]></kwd>
<kwd lng="en"><![CDATA[principal component analysis]]></kwd>
<kwd lng="en"><![CDATA[efficiency index]]></kwd>
<kwd lng="en"><![CDATA[dry matter]]></kwd>
<kwd lng="en"><![CDATA[nodulation]]></kwd>
<kwd lng="en"><![CDATA[Phaseolus vulgaris L]]></kwd>
</kwd-group>
</article-meta>
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