<?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>S2007-09342017000300705</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v8i3.43</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Envejecimiento acelerado y vigor de semillas del pasto Brachiaria brizantha cv Insurgente]]></article-title>
<article-title xml:lang="en"><![CDATA[Accelerated aging and vigor of Brachiaria brizantha cv Insurgente grass seeds]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Flores]]></surname>
<given-names><![CDATA[Edgar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Joaquín Torres]]></surname>
<given-names><![CDATA[Bertín Maurilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quero Carrillo]]></surname>
<given-names><![CDATA[Adrián Raymundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Garay]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Guzmán]]></surname>
<given-names><![CDATA[Filogonio Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados en Ciencias Agrícolas Ganadería Campus Montecillo]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Papaloapan  ]]></institution>
<addr-line><![CDATA[ Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2017</year>
</pub-date>
<volume>8</volume>
<numero>3</numero>
<fpage>705</fpage>
<lpage>711</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342017000300705&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342017000300705&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342017000300705&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Con el objetivo de evaluar pruebas de vigor en semilla de Brachiaria brizantha cv. Insurgente, dos lotes de semilla, con diferente calidad física y fisiológica inicial, cosechados el 28 de septiembre (lote 1; otoño) y 21 de diciembre (lote 2; invierno) del mismo año, se sometieron a seis temperaturas (40, 41, 42, 43, 44 y 45 ºC) y siete periodos (24, 36, 48, 60, 72, 84 y 96 h) de envejecimiento, a 100% de HR. Se utilizó un diseño completamente al azar, con arreglo factorial y cuatro repeticiones. El vigor de semilla varió entre temperaturas (p&lt; 0.001). La cosecha de Otoño (lote 1) mostró un mayor valor de germinación (28.9%) a 40 ºC; valor similar (p&gt; 0.05), al de 41 ºC (24.7%); pero, diferente y superior a los demás niveles (p&lt; 0.05). Para la semilla cosechada en invierno (lote 2), el mayor valor germinación (50%), se obtuvo a 40 ºC. El periodo de envejecimiento tuvo efecto en el vigor de semilla (p&lt; 0.001). Para la semilla de otoño, el mayor valor de germinación (40.6%) se obtuvo a 48 h, valor similar (p&gt; 0.05) al obtenido a 36 h (34.7%), pero diferente y superior a los demás periodos; mientras que, para el lote 2 (cosecha de invierno), el valor mayor (63%) se obtuvo a 60 h. La interacción fue significativa entre lotes (p&lt; 0.001); en el lote 1, la mayor germinación se presentó a 40 ºC/48 h y 40 ºC/60 h, con valores de 46 y 47%, respectivamente; mientras que, para el lote 2 (cosecha de invierno), el mayor valor (69.2%) se obtuvo a 40 ºC/60 h. La prueba de envejecimiento acelerado detectó diferencias entre lotes de semilla de B. brizantha cv Insurgente y la combinación 40 ºC/48 h y 40 ºC /60 h fueron los tratamientos más efectivos para evaluar el vigor entre lotes de semillas. La semilla cosechada en invierno mostró mayor vigor y germinación de forma consistente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract With the objective of evaluating seed vigor tests of Brachiaria brizantha cv. Insurgente, two seeds lots with different initial physical and physiological quality, harvested on September 28th (lot 1, autumn) and December 21th (lot 2, winter) of the same year, were subjected to six temperatures (40, 41, 42, 43, 44 and 45 °C) and seven aging periods (24, 36, 48, 60, 72, 84 and 96 h) at 100% HR. A completely randomized design was used, with factorial arrangement and four replications. Seed vigor varied between temperatures (p&lt; 0.001). The Autumn harvest (lot 1) showed a higher germination value (28.9%) at 40 ºC; similar value (p&gt; 0.05), at 41 ºC (24.7%); but different and superior to the other levels (p&lt; 0.05). For the seeds harvested in winter (lot 2), the highest germination value (50%) was obtained at 40 °C. The aging period had an effect on seeds vigor (p&lt; 0.001). For the autumn seeds, the highest germination value (40.6%) was obtained at 48 h, similar value (p&gt; 0.05) to that obtained at 36 h (34.7%), but different and superior to the other periods; while for lot 2 (winter harvest), the highest value (63%) was obtained at 60 h. The interaction was significant between lots (p&lt; 0.001); in lot 1, the highest germination occurred at 40 ºC/48 h and 40 ºC/60 h, with values of 46 and 47%, respectively; while for lot 2 (winter harvest), the highest value (69.2%) was obtained at 40 °C/60 h. The accelerated aging test detected differences between seeds lots of B. brizantha cv Insurgente and the combination 40 ºC/48 h and 40 ºC/60 h were the most effective treatments to evaluate the vigor between seed lots. Seeds harvested in winter showed greater vigor and consistent germination.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Brachiaria brizantha]]></kwd>
<kwd lng="es"><![CDATA[germinación]]></kwd>
<kwd lng="es"><![CDATA[pasto insurgente]]></kwd>
<kwd lng="es"><![CDATA[prueba de envejecimiento acelerado]]></kwd>
<kwd lng="es"><![CDATA[vigor]]></kwd>
<kwd lng="en"><![CDATA[Brachiaria brizantha]]></kwd>
<kwd lng="en"><![CDATA[accelerated aging test]]></kwd>
<kwd lng="en"><![CDATA[germination]]></kwd>
<kwd lng="en"><![CDATA[insurgent grass]]></kwd>
<kwd lng="en"><![CDATA[vigor]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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