<?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>S1659-13212017000200455</article-id>
<article-id pub-id-type="doi">10.15517/ma.v28i2.21801</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estimación de varianzas genéticas en ocho variedades criollas de maíz para el Bajío mexicano]]></article-title>
<article-title xml:lang="en"><![CDATA[Estimate of genetic variances in eight creole maize varieties for the mexican low-land region]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Romero]]></surname>
<given-names><![CDATA[Luis Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro-Guerrero]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De-la-Rosa-Ibarra]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Romero]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caamal-Dzul]]></surname>
<given-names><![CDATA[Ángel Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<volume>28</volume>
<numero>2</numero>
<fpage>455</fpage>
<lpage>464</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212017000200455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212017000200455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212017000200455&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del presente trabajo fue estimar la aptitud combinatoria, varianzas genéticas y heterosis en ocho variedades criollas de maíz. La investigación se efectuó en Irapuato, Guanajuato, México, durante 2008 y 2009. Se utilizó un diseño de bloques al azar con tres repeticiones para evaluar las veintiocho cruzas con el método 4 de Griffing (1956). Cada parcela experimental consistió de cuatro surcos de cinco metros de largo con una separación de 0,75 m. La aptitud combinatoria general y específica (ACG y ACE) fueron altamente significativas (P&lt;0,01) para todas las variables excepto días a floración. La varianza genética de dominancia (&#963;2D) fue mucho más grande e importante que la varianza genética aditiva (&#963;2A) para la mayoría de las variables en estudio, de tal forma que los efectos genéticos no aditivos fueron los que determinaron la expresión de las variables en los cruzamientos. Las variedades P6 (criollo #5), P7 (criollo #2) y P8 (criollo San Antonio) tuvieron los mayores valores para las varianzas asociadas a los efectos de aptitud combinatoria específica (&#963;2ACE) para longitud de mazorca, número de hileras por mazorca, número de mazorcas totales y rendimiento de grano. Algunos cruzamientos fueron identificados por su rendimiento de grano y heterosis, principalmente los que incluyeron germoplasma de los criollos #5, #2 y San Antonio, por lo que se recomienda derivar líneas de estas poblaciones para formación de híbridos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this work was to estimate the combinatory aptitude, genetic variance and heterosis of eight creole corn varieties. The research work was carried in Irapuato, Guanajuato, México, during 2008 and 2009. A randomized complete block design with three replications was used to evaluate the twenty-eight crosses under method 4 Griffing (1956). Each experimental plot included four rows five meters long with a separation of 0,75 m. The general combing ability and specific (GCA and SCA) were highly significant (P&lt;0.01) for all traits except flowering days. The dominance variance (&#963;2D) was larger and more important than additive variance (&#963;2A) for most of the traits, indicating that non-additive genetic genes were important on the expression of those traits on crosses. It was observed that varieties P6 (creole #5), P7 (creole #2) and P8 (creole San Antonio) had larger variance effects &#963;2SCA for long cob, number of rows per cob, total cob number, and grain yield. Some outstanding crosses were identified for their high grain yield as well as heterosis, mainly those that included germoplasm of creole #5, #2 and San Antonio. According to the aforementioned we recommend to draw lines from the above populations and cross them to produce hybrids.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[aptitud combinatoria]]></kwd>
<kwd lng="es"><![CDATA[cruzas dialélicas]]></kwd>
<kwd lng="es"><![CDATA[Zea mays]]></kwd>
<kwd lng="es"><![CDATA[heterosis]]></kwd>
<kwd lng="en"><![CDATA[combining ability]]></kwd>
<kwd lng="en"><![CDATA[diallel crosses]]></kwd>
<kwd lng="en"><![CDATA[Zea mays]]></kwd>
<kwd lng="en"><![CDATA[heterosis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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