<?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>S0187-73802020000500549</article-id>
<article-id pub-id-type="doi">10.35196/rfm.2020.4-a.549</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Rendimiento de variedades de soya evaluadas en diferente fecha de siembra en Campeche, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Grain yield of soybean varieties across different sowing dates in Campeche, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Pérez]]></surname>
<given-names><![CDATA[Mirna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Rocha]]></surname>
<given-names><![CDATA[Jesus Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Avila-Perches]]></surname>
<given-names><![CDATA[Miguel Angel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gámez-Vázquez]]></surname>
<given-names><![CDATA[Francisco Paúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gámez-Vázquez]]></surname>
<given-names><![CDATA[Alfredo Josué]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[O-Olán]]></surname>
<given-names><![CDATA[Micaela de la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[ Campeche]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>43</volume>
<numero>4a</numero>
<fpage>549</fpage>
<lpage>556</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802020000500549&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802020000500549&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802020000500549&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Campeche es unos de los principales estados productores de soya (Glycine max L. Merr.) en México, con un rendimiento promedio de 2.6 t ha-1; sin embargo, en éste se tiene una variación significativa en los rendimientos anuales. Algunos autores han asociado estas variaciones a los genotipos, a las fechas de siembra y a su interacción. Por considerar que en este tema existe poca información se realizó este trabajo con el objetivo de estudiar los efectos de cuatro fechas de siembra (19 junio, 10 julio, 2 de agosto y 20 de agosto) durante 2017 y 2018 en el rendimiento de nueve variedades de soya (H100, H200, H300, H400, H600, Tamesí, Vernal, Luziania y Mariana). El experimento se estableció con un arreglo de parcelas divididas en un diseño experimental de bloques completos al azar. Los análisis estadísticos fueron análisis de varianza, pruebas de medias, análisis de componentes principales y de regresión en los sitios (SREG) para las para las interacciones genotipo x ambiente. Las fechas del 19 de junio y 10 de julio tuvieron el rendimiento más alto (3 t ha-1), el cual estuvo asociado con el peso de grano, el número de ramas por planta y el número de semillas por planta. Al retrasar la fecha de siembra se redujo el rendimiento por planta entre 5.7 y 10 g día-1, asociado a una disminución en el peso de grano, número de vainas, semillas y ramas por planta. En las siembras del 19 de junio sobresalió en rendimiento H100 y en la del 10 de julio destacó H200. Las variedades con menores rendimientos fueron Mariana (2.3 t ha-1) y Luziania (2.4 t ha-1). Los resultados de este estudio sugieren que no es recomendable sembrar soya en fechas tardías de agosto en Campeche.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary Campeche is one of the major soybean (Glycine max L. Merr) producing states in Mexico, with an average yield of 2.6 t ha-1; however, in it there is a significant variation on yield across years. Some authors have associated these variations to factors linked to genotypes, sowing dates and their interactions. Taking in account that there is reduced information on this topic, the objective of this study was to evaluate the effect of four sowing dates (June 19, July 10, August 2 and August 20) across 2017 and 2018 on the yield of nine soybean cultivars (H100, H200, H300, H400, H600, Tamesí, Vernal, Luziania and Mariana). The experiment was established in a split plot experiment arranged in a randomized complete block design. The statistical analyses were variance analysis, mean test, principal component analysis and SREG for the EG interaction analysis. Results showed that the highest yield (3 t ha-1) were observed on June 19 and July 10, and was associated with the traits grain weight, number of branches per plant and number of seeds per plant. In later sowing dates, it was observed a decrease in plant yield in the range of 5.7-10.0 g day-1, that was associated to a decrease in grains weight, number of branches and seeds and pods per plant. H100 cultivar excelled in yield in June 19 sowing date and H200 in July 10. The cultivars with the lowest yields were Mariana (2.3 t ha-1) and Luziania (2.4 t ha-1). Our results suggest that late sowing dates in august are not recommended for soybeans grown in Campeche.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Glycine max L. Merr.]]></kwd>
<kwd lng="es"><![CDATA[fechas de siembra]]></kwd>
<kwd lng="es"><![CDATA[interacción genotipo por ambiente]]></kwd>
<kwd lng="es"><![CDATA[rendimiento]]></kwd>
<kwd lng="es"><![CDATA[variedades]]></kwd>
<kwd lng="en"><![CDATA[Glycine max L. Merr.]]></kwd>
<kwd lng="en"><![CDATA[cultivars]]></kwd>
<kwd lng="en"><![CDATA[genotype by environment interaction]]></kwd>
<kwd lng="en"><![CDATA[sowing date]]></kwd>
<kwd lng="en"><![CDATA[yield]]></kwd>
</kwd-group>
</article-meta>
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