<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342016000200387</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Parámetros genéticos y heterosis en líneas derivadas de poblaciones nativas de maíz tropical de Tamaulipas]]></article-title>
<article-title xml:lang="en"><![CDATA[Heterosis and genetic parameters in lines derived from native populations in tropical corn Tamaulipas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Martínez]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Santillán]]></surname>
<given-names><![CDATA[José Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada Drouaillet]]></surname>
<given-names><![CDATA[Benigno]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado Martínez]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pecina Martínez]]></surname>
<given-names><![CDATA[José Agapito]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Varela Fuentes]]></surname>
<given-names><![CDATA[Edmundo Sostenes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osorio Hernández]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rocandio Rodríguez]]></surname>
<given-names><![CDATA[Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas Facultad de Ingeniería y Ciencias ]]></institution>
<addr-line><![CDATA[Victoria Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Instituto de Recursos Genéticos y Productividad ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>2</numero>
<fpage>387</fpage>
<lpage>399</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016000200387&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016000200387&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016000200387&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se determinó los efectos de aptitud combinatoria general (ACG) y especifica (ACE) para rendimiento de grano y sus componentes, además de estimar el grado de dominancia, heterosis y heredabilidad, con el propósito de identificar y evaluar patrones heteroticos entre líneas endogámicas de maíz desarrolladas a partir de germoplasma nativo del centro y sur de Tamaulipas. Las 30 cruzas directas y recíprocas, así como sus progenitores se evaluaron en Güemez y Rio Bravo, estado de Tamaulipas, durante el ciclo otoño-invierno de 2012-2013. La unidad experimental consistió de un surco de 5 m de longitud, con una distancia entre surcos de 0.8 m y de 0.25 m entre plantas. Las evaluaciones se establecieron en un diseño de bloques completos al azar con tres repeticiones. Se midió rendimiento de grano (RGha), longitud de mazorca (LMZ), diámetro de mazorca (DMZ), número de granos por mazorca (NGM), altura de planta (AP), peso individual de grano (PIG) y días a floración masculina (DFM). Para estimar los efectos de ACG y ACE se empleó el método I de Griffing. Los resultados obtenidos del análisis combinado indicaron diferencias significativas para los genotipos. Los progenitores L1, L2, L4, L5 y L6 estuvieron involucrados en las mejores cruzas para rendimiento de grano, mientras que las cruzas L1 × L5, L2 × L4 y L5 × L6 mostraron efectos positivos de heterosis y ACE. Las cruzas L4 × L3, L4 × L5, L5 × L4, L5 × L6, L6 × L4 L6 × L5 mostraron rendimientos de grano superiores a la media. Los efectos aditivos fueron el componente principal para la expresión de las variables evaluadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The effects of general combining ability (ACG) and specific (ACE) for grain yield and its components was determined, in addition to estimating the degree of dominance, heterosis and heritability, in order to identify and assess heterotic patterns among corn inbred lines developed from native germplasm of central and southern Tamaulipas. The 30 direct and reciprocal crosses and their parents were evaluated in Güemez and Rio Bravo, Tamaulipas state, during the autumn-winter 2012-2013 cycle. The experimental unit consisted of a row of 5 m in length, with a row spacing of 0.8 m and 0.25 m between plants. Evaluations were established in a randomized complete design with three replications blocks. Grain yield (RGha), ear length (LMZ), ear diameter (DMZ), number of grains per ear (NGM), plant height (AP), single grain weight (PIG) and length were measured at flowering male (DFM). To estimate the effects of ACG and ACE, was used I Griffing method. The results of combined analysis showed significant differences for genotypes. The L1, L2, L4, L5 and L6 parents were involved in the best crosses for grain yield, while a cross L1 × L5, L2 × L4 and L5 × L6 showed positive effects of heterosis and ACE. The crosses L4 × L3, L4 × L5, L5 × L4, L5 × L6, L6 × L4, L6 × L5 yields showed above average grain. Additive effects were the main component for the expression of the variables evaluated.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Zea mays L.]]></kwd>
<kwd lng="es"><![CDATA[aptitud combinatoria]]></kwd>
<kwd lng="es"><![CDATA[dialélico]]></kwd>
<kwd lng="es"><![CDATA[germoplasma nativo]]></kwd>
<kwd lng="en"><![CDATA[Zea mays L.]]></kwd>
<kwd lng="en"><![CDATA[combining ability]]></kwd>
<kwd lng="en"><![CDATA[diallel]]></kwd>
<kwd lng="en"><![CDATA[native germplasm]]></kwd>
</kwd-group>
</article-meta>
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