<?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>S2007-09342018000501023</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v9i5.1507</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Temperaturas base y grados días desarrollo de 10 accesiones de maíz de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Base temperatures and degrees days development of 10 Mexican corn accessions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arista-Cortes]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quevedo Nolasco]]></surname>
<given-names><![CDATA[Abel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamora Morales]]></surname>
<given-names><![CDATA[Bertha Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bauer Mengelberg]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sonder]]></surname>
<given-names><![CDATA[Kai]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lugo Espinosa]]></surname>
<given-names><![CDATA[Oziel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Internacional de Mejoramiento de Maíz y Trigo  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[Texcoco ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,INIFAP CENID COMEF]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma del Estado de México  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>5</numero>
<fpage>1023</fpage>
<lpage>1033</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342018000501023&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342018000501023&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342018000501023&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La variación de temperaturas de un lugar es función de los elementos y factores del clima, mismos que son alterados en mayor o menor grado por el cambio climático, lo que es un reto el determinar los periodos de crecimiento térmico, más óptimos de siembra para diversos cultivos por región. Con base en lo anterior el objetivo de este estudio fue determinar la temperatura base (Tb) y los grados días desarrollo (GDD) de la siembra a floración (femenina y masculina) para 10 accesiones de maíz que están resguardadas en el banco de germoplasma del CIMMYT. Se recolectó y analizó la información (duración en días (t) de los periodos de siembra a floración y su respectiva temperatura media) de diferentes experimentos de campo de las estaciones de campo (Agua Fría, Puebla y Tlaltizapan, Morelos) de los años 2008, 2009, 2011, 2012 y 2013. La cuál se ajustó a un modelo lineal por regresión lineal entre la tasa de desarrollo (1/t) y la temperatura promedio del periodo. Se estimaron los GDD por accesión con el cociente 1/&#945; donde &#945; es el parámetro de la regresión y Tb. Lo resultados señalan que Tb vario de 7.1 a 13 °C para floración masculina y 5.4 a 12.1 °C para floración femenina con acumulación de GDD entre 880 y 1696 floración masculina y 1115 a 1860 floración femenina, que permite caracterizar a las accesiones evaluadas en orden de mayor a menor precocidad: Chis337, Yuca91, Vera617, Yuca158, Yuca47, Vera616, Vera64, Vera623, Snlp277, Hida275 y se confirma que el conocer los requerimientos agroclimáticos de los cultivos permite seleccionar regiones que favorezcan el crecimiento, desarrollo, reducción de pérdidas e incrementar rendimientos así como preservar la variabilidad genética de las especies.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The temperature variation of a place is a function of the elements and factors of the climate, which are altered to a greater or lesser extent by climate change, which is a challenge to determine the periods of thermal growth, optimum sowing for various crops by region. Based on the above, the objective of this study was to determine the base temperature (Tb) and the degree days development (GDD) of the sowing to flowering (male and female) for 10 accessions of corn that are protected in the Germplasm Bank of CIMMYT. The information was collected and analyzed (duration in days (t) of the periods of Sowing to Flowering and its respective average temperature) of different field experiments of the field stations (Agua Fria, Puebla and Tlaltizapan, Morelos) of the years 2008, 2009, 2011, 2012 and 2013. Which was adjusted to a linear model by linear regression between the development rate (1/t) and the average temperature of the period. The GDD were estimated by accession with the ratio 1/&#945; where &#945; is the parameter of the regression and Tb. The results indicate that Tb varied from 7.1 to 13 °C for male flowering and 5.4 to 12.1 °C for female flowering with an accumulation of GDD between 880 and 1696 male flowering and 1115 to 1860 female flowering, which allows to characterize the accessions evaluated in order of highest to lowest precocity: Chis337, Yuca91, Vera617, Yuca158, Yuca47, Vera616, Vera64, Vera623, Snlp277, Hida275, confirming that knowing the agroclimatic requirements of crops allows selecting regions that favor growth , development, reduction of losses and increase yields as well as preserving the genetic variability of the species.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[grados días desarrollo]]></kwd>
<kwd lng="es"><![CDATA[modelo lineal]]></kwd>
<kwd lng="es"><![CDATA[temperatura base]]></kwd>
<kwd lng="en"><![CDATA[base temperature]]></kwd>
<kwd lng="en"><![CDATA[degree days development]]></kwd>
<kwd lng="en"><![CDATA[linear model]]></kwd>
</kwd-group>
</article-meta>
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