<?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>S0187-73802021000300465</article-id>
<article-id pub-id-type="doi">10.35196/rfm.2021.3.465</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia de la relación fuente/demanda sobre la senescencia retardada del tallo de soya]]></article-title>
<article-title xml:lang="en"><![CDATA[Influence of the source/sink relationship on green stem syndrome in soybean]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maidana-Ojeda]]></surname>
<given-names><![CDATA[Marco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Britez]]></surname>
<given-names><![CDATA[Sebastián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fin-Mieres]]></surname>
<given-names><![CDATA[Mariana B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Enciso-Maldonado]]></surname>
<given-names><![CDATA[Guillermo A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Católica Nuestra Señora de la Asunción Facultad de Ciencias Agropecuarias Departamento de Itapúa]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Desarrollo e Innovación Tecnológica Departamento de Itapúa ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<numero>3</numero>
<fpage>465</fpage>
<lpage>470</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802021000300465&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802021000300465&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802021000300465&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En los últimos años se ha observado un incremento de plantas con senescencia retardada del tallo de soya (Glycine max L. Merr.) en la región sur de Paraguay, sin que se haya estudiado el origen de este fenómeno. Bajo la hipótesis de que la senescencia retardada del tallo de soya está influenciada por la relación fuente/demanda, el objetivo del presente estudio fue evaluar el efecto de la eliminación de vainas sobre la senescencia retardada del tallo de la soya. El experimento se realizó en condiciones de campo en las temporadas 2016/2017 y 2019/2020 en los distritos Tomás Romero y Carlos Antonio López, respectivamente, ambas en el Departamento de Itapúa, Paraguay. El diseño experimental utilizado fue de bloques completos al azar con seis tratamientos y cuatro repeticiones. Los tratamientos fueron los porcentajes de retención de las vainas de 0, 20, 40, 60, 80 y 100 %. En inicio de formación de semillas (R5) se cuantificó número de vainas y se eliminaron manualmente de acuerdo con los porcentajes correspondientes a cada tratamiento. Las variables evaluadas fueron el número de hojas retenidas por planta, porcentaje de tallos verdes, porcentaje de vainas verdes, peso de 100 granos, humedad de granos y rendimiento. Al disminuir los niveles de retención de vainas aumentan la cantidad de hojas retenidas, el porcentaje de tallos y vainas verdes y el peso de 100 granos. El rendimiento aumenta con una tendencia cuadrática a medida que se incrementa el porcentaje de vainas retenidas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary In recent years there has been an increase in plants with green stem syndrome of soybean (Glycine max) in the southern region of Paraguay, without studying the origin of this phenomenon. Under the hypothesis that green stem syndrome of the soybean is influenced by the source/sink relationship, the aim of this study was to evaluate the effect of pod removal on green stem syndrome of the soybean. The experiment was carried out under field conditions in the 2016/2017 and 2019/2020 seasons in the Tomás Romero and Carlos Antonio López districts, respectively, both in the Department of Itapúa, Paraguay. The experimental design used was randomized complete blocks with six treatments and four replications. The treatments were the pod retention percentages of 0, 20, 40, 60, 80 and 100 %. At the beginning of seed formation (R5) the number of pods was quantified and they were manually removed according to the percentages corresponding to each treatment. The variables evaluated were the number of retained leaves per plant, percentage of green stems, percentages of green pods, weight of 100 grains, grain moisture and yield. As pod retention levels decrease, the number of leaves retained increases, the percentage of green stems and pods and the weight of 100 grains increase. Yield increases with a quadratic trend as the percentage of retained pods increases.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Glycine max (L). Merr.]]></kwd>
<kwd lng="es"><![CDATA[retención de vainas]]></kwd>
<kwd lng="es"><![CDATA[senescencia retardada del tallo]]></kwd>
<kwd lng="es"><![CDATA[tallos verdes]]></kwd>
<kwd lng="en"><![CDATA[Glycine max (L.) Merr.]]></kwd>
<kwd lng="en"><![CDATA[green stems]]></kwd>
<kwd lng="en"><![CDATA[green stem syndrome]]></kwd>
<kwd lng="en"><![CDATA[pod retention]]></kwd>
</kwd-group>
</article-meta>
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