<?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>0187-7380</journal-id>
<journal-title><![CDATA[Revista fitotecnia mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. fitotec. mex]]></abbrev-journal-title>
<issn>0187-7380</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitogenética A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73802016000400367</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Incremento en el rendimiento y sus componentes bajo riego normal y restringido de variedades mexicanas de trigo]]></article-title>
<article-title xml:lang="en"><![CDATA[Gains in yield and its components under normal and limited irrigation of Mexican wheat cultivars]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paquini-Rodríguez]]></surname>
<given-names><![CDATA[Sara L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez-Riquelme]]></surname>
<given-names><![CDATA[Ignacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villaseñor-Mir]]></surname>
<given-names><![CDATA[Héctor E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Orozco]]></surname>
<given-names><![CDATA[Abel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vaquera-Huerta]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Programa de Genética del Posgrado de Recursos Genéticos y Productividad ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Programa de Trigo, Campo Experimental Valle de México ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Programa de Socioeconomía, Estadística e Informática ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>39</volume>
<numero>4</numero>
<fpage>367</fpage>
<lpage>378</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802016000400367&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802016000400367&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802016000400367&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El agua que se utiliza para el riego en las zonas trigueras de México tiene limitantes, y dado el incremento en el consumo de trigo (Triticum aestivum L.), la presión sobre el recurso hídrico aumentará. El objetivo de la presente investigación fue evaluar bajo riego normal y restringido, el desempeño en rendimiento de grano y sus componentes de 16 variedades de trigo harinero liberadas desde la década de 1940 hasta el 2015. Durante el ciclo de cultivo otoño-invierno (2014 a 2015) se establecieron cuatro experimentos, dos en Montecillo, Edo. de México y dos en Celaya, Guanajuato, en una fecha de siembra óptima y otra tardía. El diseño experimental fue bloques al azar con arreglo de parcelas divididas donde la parcela grande fue el nivel de riego, y la pequeña las variedades. El riego restringido no fue lo suficientemente severo como para detectar diferencias significativas en el rendimiento y sus componentes, excepto para la fecha tardía en Celaya. Los análisis combinados y para fechas de siembra revelaron diferencias significativas entre los niveles de riego para todas las variables en estudio, de las cuales las más afectadas por restringir el riego fueron rendimiento de grano, biomasa aérea, y número de granos por m2, con una reducción de 20.3, 16.8, y 14.5 %, respectivamente. La ganancia del rendimiento de grano fue 1.21 % anual (41.77 kg ha-1), que representó un aumento acumulado de 2.8 t ha-1 en 67 años. Bajo riego normal el progreso de 1.10 % fue menor que bajo riego restringido (1.35 %), lo que indica que en el futuro el rendimiento podría mantenerse con menos consumo de agua y esto permitiría ampliar el área sembrada usando el mismo volumen de agua.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Availability of irrigation water for wheat-producing areas in México is limited, but wheat (Triticum aestivum L.) demand keeps increasing, and thus water needs are greater. This study tested 16 bread wheat cultivars released from 1940 to 2015 and recorded their grain yield and its components. Four field trials were established during the 2014 2015 Fall Winter crop season. Two trials were sowed in Montecillo, state of México and two in Celaya, Guanajuato, and two sowing dates were tested: optimum and late. The experiments were arranged in random blocks under a split plot design. Main plots were irrigation levels, and small plots were cultivars. Under limited irrigation, most treatment combinations did not show significant differences in yield and its components, except for late-sown wheat in Celaya. Combined and sowing dates analyses revealed significant differences among irrigation levels for all the variables recorded. Limited irrigation affected grain yield, aerial biomass, and number of grains per m2; their reduction was 20.3, 16.8, and 14.5 %, respectively. Annual average yield increased 1.21 % (41.77 kg ha-1); in 67 years, the accumulated yield increment is 2.8 t ha-1. Rate of yield improvement decreased under normal irrigation (1.10 %) compared to the rate under limited irrigation (1.35 %). These results suggest that less water may produce the same yield in the future, and current water volume could support a wider cultivated area.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Rendimiento de grano]]></kwd>
<kwd lng="es"><![CDATA[riego restringido]]></kwd>
<kwd lng="es"><![CDATA[Triticum aestivum]]></kwd>
<kwd lng="es"><![CDATA[variedades mexicanas de trigo]]></kwd>
<kwd lng="en"><![CDATA[Grain yield]]></kwd>
<kwd lng="en"><![CDATA[limited irrigation]]></kwd>
<kwd lng="en"><![CDATA[Triticum aestivum]]></kwd>
<kwd lng="en"><![CDATA[Mexican bread wheat cultivars]]></kwd>
</kwd-group>
</article-meta>
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