<?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>2007-1132</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. forestales]]></abbrev-journal-title>
<issn>2007-1132</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11322024000600144</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v15i86.1482</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Observaciones fenológicas en clones de Pinus patula Schltdl. &amp; Cham.]]></article-title>
<article-title xml:lang="en"><![CDATA[Phenological observations on Pinus patula Schltdl. &amp; Cham. clones]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velasco Hernández]]></surname>
<given-names><![CDATA[Sara Irene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz Gutiérrez]]></surname>
<given-names><![CDATA[Liliana]]></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 Centro Nacional de Investigación Disciplinaria en Conservación y Mejoramiento de Ecosistemas Forestales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>15</volume>
<numero>86</numero>
<fpage>144</fpage>
<lpage>166</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322024000600144&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322024000600144&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322024000600144&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La falta de sincronización floral en un huerto semillero propicia la disminución de la diversidad genética del lote de semillas, aumenta el porcentaje de óvulos abortivos y de semillas vacías. Por lo anterior, es necesario determinar las etapas fenológicas y el grado de sincronización entre la dispersión del polen y la receptividad femenina. En un huerto semillero asexual de Pinus patula de generación 1.5, se estimaron las fechas de inicio, fin y duración de cada etapa fenológica de las estructuras reproductivas masculinas y femeninas con el macro SYNCHRO de SAS ®. El periodo de receptividad femenina duró 13 días en promedio y el de dispersión de polen 27.5 días. La dispersión de polen y receptividad femenina ocurrieron cuando se acumularon 370.5 y 440 grados-día, respectivamente. El Índice de sincronización general del huerto se considera bajo (PO=0.24), por lo que no existe una total sincronización entre los pares de clones. Se verificó correlación positiva entre el inicio y la duración de ambos eventos fenológicos (r=0.41) con sincronía de siete días; por tanto, es posible que se lleve a cabo la polinización entre los clones del huerto con índices de sincronización moderados (PO entre 0.30 a 0.60), pero se requiere determinar la variabilidad y control genético de los clones en evaluaciones subsecuentes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The lack of floral synchronization in a seed orchard favors a decrease in the genetic diversity of the seed lot, increases the percentage of abortive ovules and empty seeds. Therefore, it is necessary to determine the phenological stages and the degree of synchronization between pollen dispersal and female receptivity. In a 1.5 generation Pinus patula clonal seed orchard, the start, end and duration dates of each phenological stage of the male and female reproductive structures were estimated by macro-SYNCHRO. The female receptivity period lasted 13 days average, and the pollen dispersal period, 27.5 days. Pollen dispersal and female receptivity occurred when 370.5 and 440 degree-days accumulated, respectively. The general synchronization index of the orchard is considered low (PO=0.24) so there is no total synchronization between clone pairs. A positive correlation was found between the onset and duration of both phenological events (r=0.41) with a synchrony of seven days; therefore, it is possible that pollination between clones in the orchard with moderate synchronization indexes (PO between 0.30 to 0.60) can take place, but it is necessary to determine the variability and genetic control of the clones in subsequent evaluations.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Dispersión de polen]]></kwd>
<kwd lng="es"><![CDATA[grados-día]]></kwd>
<kwd lng="es"><![CDATA[rametos]]></kwd>
<kwd lng="es"><![CDATA[receptividad femenina]]></kwd>
<kwd lng="es"><![CDATA[semillas]]></kwd>
<kwd lng="es"><![CDATA[sincronización fenológica]]></kwd>
<kwd lng="en"><![CDATA[Pollen dispersal]]></kwd>
<kwd lng="en"><![CDATA[degree-day]]></kwd>
<kwd lng="en"><![CDATA[ramets]]></kwd>
<kwd lng="en"><![CDATA[feminine receptiveness]]></kwd>
<kwd lng="en"><![CDATA[seeds]]></kwd>
<kwd lng="en"><![CDATA[phenological synchronization]]></kwd>
</kwd-group>
</article-meta>
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