<?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>2301-1548</journal-id>
<journal-title><![CDATA[Agrociencia (Uruguay)]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia Uruguay]]></abbrev-journal-title>
<issn>2301-1548</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2301-15482018000100045</article-id>
<article-id pub-id-type="doi">10.31285/agro.22.1.5</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Multiplication of Soybean Seeds at Low Seeding Rates]]></article-title>
<article-title xml:lang="es"><![CDATA[Multiplicación de semillas de soja en bajas densidades de siembra]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Menegaz]]></surname>
<given-names><![CDATA[Winícius]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suárez-Castellanos]]></surname>
<given-names><![CDATA[César Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Geri]]></surname>
<given-names><![CDATA[Eduardo Meneghello]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bohn]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[Alex Leal de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Schuch]]></surname>
<given-names><![CDATA[Luis Osmar Braga]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Agropastoril Jotabasso LTDA  ]]></institution>
<addr-line><![CDATA[Rondonópolis MT]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal de Pelotas Faculdade de Agronomia Eliseu Maciel Programa de Pós-Graduação em Ciência e Tecnologia de Sementes]]></institution>
<addr-line><![CDATA[Pelotas RS]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Syngenta, Copercampos  ]]></institution>
<addr-line><![CDATA[Campos Novos SC]]></addr-line>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Federal Farroupilha  ]]></institution>
<addr-line><![CDATA[Alegrete RS]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>22</volume>
<numero>1</numero>
<fpage>45</fpage>
<lpage>52</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2301-15482018000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2301-15482018000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2301-15482018000100045&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: The genetic seed produced by the breeder is far from enough to supply the market demand, a problem that can be faced with a two-way approach: increasing the area of multiplication, and/or increasing the seed-multiplying factor. Testing the limits of low seeding rates to determine the resulting increase in individual plant seed production is an extremely useful trait for breeding programs as well as for seed production. The aim of this work was to establish the multiplication factor for soybean seeds resulting from stands obtained from low seeding rates. Stands of 35, 50, 65, 80, 95, and 110 thousand plants per hectare of soybean cultivar BMX Potência RR were displayed in a completely randomized block design, assessing seed yield, yield components and the physiological quality of seeds. Soybean seed yield from low stands treatments did not compromise the physiological quality of the seed produced, however, the higher seed potential of individual plants did not compensate for the lower seed yield per area obtained compared to that of seed rates close to the optimum. For each 15-thousand per hectare stand increase we observed an increase of up to 405 kg (16 % in average) for the range of seed rates studied, however, the seed multiplication factor decreased at a rate of 9 % per each 15-thousand plants per hectare.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La cantidad de semilla genética producida por el obtentor está lejos de ser suficiente para satisfacer la demanda del mercado, una situación que puede ser abordada con un enfoque bidireccional: aumentando el área de multiplicación y/o aumentando el factor de multiplicación de semillas. Conocer los límites de las bajas densidades de siembra para determinar el aumento de la producción de semillas por cada planta es una información extremadamente útil para quienes participan en los programas de mejoramiento, así como en la producción de semillas. El objetivo de este trabajo fue establecer el factor de multiplicación de semillas de soja obtenidas en bajas densidades de siembra. Se usaron densidades de siembra de 35, 50, 65, 80, 95 y 110 mil plantas por hectárea del cultivar de soja BMX Potência RR en un diseño de bloques completamente al azar, evaluando el rendimiento de semillas, los componentes del rendimiento y la calidad fisiológica de la semilla. El rendimiento de semillas de soja en bajas densidades de siembra no comprometió la calidad fisiológica de las semillas producidas, sin embargo, la mayor producción de semillas por planta alcanzada en las bajas densidades no compensó el menor rendimiento de semillas por área producidas en densidades de siembra cercanas al óptimo. Para cada incremento de 15.000 plantas por hectárea observamos un incremento de hasta 405 kg (16 % en promedio) para el rango de densidades de siembra estudiado, sin embargo, el factor de multiplicación de semillas disminuyó un 9 %.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Glycine max]]></kwd>
<kwd lng="en"><![CDATA[physiological quality]]></kwd>
<kwd lng="en"><![CDATA[productivity]]></kwd>
<kwd lng="en"><![CDATA[seed production]]></kwd>
<kwd lng="en"><![CDATA[multiplication factor]]></kwd>
<kwd lng="es"><![CDATA[Glycine max]]></kwd>
<kwd lng="es"><![CDATA[calidad fisiológica]]></kwd>
<kwd lng="es"><![CDATA[producción de semillas]]></kwd>
<kwd lng="es"><![CDATA[productividad]]></kwd>
<kwd lng="es"><![CDATA[factor de multiplicación]]></kwd>
</kwd-group>
</article-meta>
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