<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242021000300811</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v12i3.5720</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fases de desarrollo y propagación de ecotipos destacados de Tithonia diversifolia (Hemsl.) A. Gray]]></article-title>
<article-title xml:lang="en"><![CDATA[Phases of development and propagation of outstanding ecotypes of Tithonia diversifolia (Hemsl.) A. Gray]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera-Herrera]]></surname>
<given-names><![CDATA[Julián Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruíz-Vásquez]]></surname>
<given-names><![CDATA[Tomás]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chará-Orozco]]></surname>
<given-names><![CDATA[Julián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Leyva]]></surname>
<given-names><![CDATA[Juan Florencio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barahona-Rosales]]></surname>
<given-names><![CDATA[Rolando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria  ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Ciencia Animal  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico de Tlajomulco  ]]></institution>
<addr-line><![CDATA[ Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</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>12</volume>
<numero>3</numero>
<fpage>811</fpage>
<lpage>827</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242021000300811&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242021000300811&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242021000300811&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La propagación eficiente de especies vegetales con alto potencial alimenticio juega un papel fundamental en su adopción y utilización por parte de los productores. Es importante, por tanto, desarrollar métodos económicos y rápidos para el establecimiento exitoso de sistemas más productivos. Con el objetivo de conocer algunos aspectos reproductivos de diferentes genotipos destacados de T. diversifolia y así favorecer su propagación y mejorar su uso en la alimentación animal, se evaluó su potencial de germinación, producción de semilla y duración del ciclo reproductivo. Se usaron 42 parcelas en un diseño de bloques completos al azar con siete genotipos de T. diversifolia y dos niveles (sin y con fertilización). Los genotipos tuvieron diferencias en todas las variables agronómicas y de producción de semilla a excepción del tiempo de secado de aquenios y en el porcentaje de semillas rudimentarias (P&lt;0.01). Con relación a la producción de semilla sexual, la fertilización tuvo efecto significativo (P&lt;0.05) y en general incrementó el tiempo de las fases evaluadas. La mayor producción de semilla se dio en los genotipos 7 y 5 y el porcentaje de germinación tuvo diferencias significativas entre genotipos y entre los tratamientos pre-germinativos (P=0.0001) con mayores porcentajes en los genotipos 3 y 6. Se concluye que a pesar de la baja viabilidad de la semilla sexual de T. diversifolia, existen genotipos con un mayor potencial de producción de semilla y porcentaje de germinación, parámetros que pueden ser mejorados por medio de tratamientos pre-germinativos y el uso de fertilizantes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The efficient propagation of plant species with high food potential plays a fundamental role in their adoption and use by producers. It is important, therefore, to develop economical and rapid methods for the successful establishment of more productive systems. In order to know some reproductive aspects of different outstanding genotypes of T. diversifolia and thus favor its propagation and improve its use in animal feeding, its germination potential, seed production and duration of the reproductive cycle were evaluated. Forty-two (42) plots were used in a randomized complete block design with seven genotypes of T. diversifolia and two levels (without and with fertilization). Genotypes had differences in all agronomic and seed production variables except for achene drying time and rudimentary seed percentage (P&lt;0.01). In relation to the production of true seed, fertilization had a significant effect (P&lt;0.05) and, in general, increased the time of the phases evaluated. The highest seed production occurred in genotypes 7 and 5 and the percentage of germination had significant differences between genotypes and between pre-germinative treatments (P= 0.0001) with higher percentages in genotypes 3 and 6. It is concluded that despite the low viability of the true seed of T. diversifolia, there are genotypes with a greater potential for seed production and germination percentage, parameters that can be improved by means of pre-germinative treatments and the use of fertilizers.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fase reproductiva]]></kwd>
<kwd lng="es"><![CDATA[Germinación]]></kwd>
<kwd lng="es"><![CDATA[Propagación vegetal]]></kwd>
<kwd lng="es"><![CDATA[Semilla sexual]]></kwd>
<kwd lng="es"><![CDATA[Viabilidad de la semilla]]></kwd>
<kwd lng="en"><![CDATA[Reproductive phase]]></kwd>
<kwd lng="en"><![CDATA[Germination]]></kwd>
<kwd lng="en"><![CDATA[Plant propagation]]></kwd>
<kwd lng="en"><![CDATA[True seed]]></kwd>
<kwd lng="en"><![CDATA[Seed viability]]></kwd>
</kwd-group>
</article-meta>
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