<?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>S0187-73802021000200211</article-id>
<article-id pub-id-type="doi">10.35196/rfm.2021.2.211</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Características reproductivas y calidad de semilla en poblaciones fragmentadas de Pinus chiapensis (Martínez) Andresen]]></article-title>
<article-title xml:lang="en"><![CDATA[Reproductive characteristics and seed quality in fragmented populations of Pinus chiapensis (Martínez) Andresen]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Capilla-Dinorin]]></surname>
<given-names><![CDATA[Elisea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Upton]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Casas]]></surname>
<given-names><![CDATA[Marcos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rebolledo-Camacho]]></surname>
<given-names><![CDATA[Virginia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Montecillo Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Veracruzana Instituto de Investigaciones Forestales ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<numero>2</numero>
<fpage>211</fpage>
<lpage>219</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802021000200211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802021000200211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802021000200211&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Pinus chiapensis (Martínez) Andresen es un árbol de rápido crecimiento, apreciado por su calidad de madera, cuyas poblaciones septentrionales en los límites estatales de Puebla y Veracruz, México son pequeñas, están fragmentadas y presentan repoblación reducida. El objetivo del presente estudio fue caracterizar algunos rasgos reproductivos asociados con la regeneración de siete poblaciones de Pinus chiapensis en dichos estados. Se muestreó un total de 125 árboles (de 15 a 22 árboles por población) y se evaluó la semilla cosechade de una muestra de 10 conos maduros por árbol. Se determinó el largo, ancho y peso seco de cono, el potencial de producción de semilla, los porcentajes de semilla llena, vana, plagada y óvulos abortados, además del peso promedio de la semilla. Se realizó una prueba de germinación en una cámara de ambiente controlado. En todas variables evaluadas se detectaron diferencias significativas entre poblaciones. El largo y ancho promedio de cono fue de 95.9 y 28.7 mm, respectivamente; ambas correlacionaron positivamente con la altitud de origen de la población. El número potencial promedio de semillas por estróbilo fue de 89, de las cuales resultaron 59 % óvulos abortados, 22.6 % semillas vanas, 0.9 % semillas plagadas y 17.5 % semillas llenas, lo que indica una reducida eficiencia de producción de semilla (1 a 16 semillas llenas por cono). El alto porcentaje de óvulos abortados indica problemas de polinización asociados con el tamaño reducido de las poblaciones. Se encontró una eficiencia reproductiva de 25.6 mg de semilla por gramo de cono. La semilla mostró una capacidad germinativa de 75.7 %, un valor pico de 3.74 % por día y un valor germinativo de 9.74 A pesar de la baja producción de semillas llenas y el alto porcentaje de semillas vanas, las poblaciones evaluadas produjeron semillas llenas de aceptable calidad germinativa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY Pinus chiapensis (Martínez) Andresen is a fast-growing tree, appreciated for its wood quality, whose northern populations, in the state limits of Puebla and Veracruz, Mexico are small, fragmented and with reduced regeneration. The objective of this study was to characterize some reproductive traits associated with regeneration of seven Pinus chiapensis populations in these states. A total of 125 trees were sampled (15 to 22 trees per population) and the seed harvested from a sample of 10 mature cones per tree was evaluated. The length, width and dry weight of the cones, the potential for seed production, percentages of filled, empty and plagued seeds, aborted ovules and the average weight of the seed were determined. A germination test was carried out in a controlled-environment chamber. Significant differences were detected between populations in all variables evaluated. The average cone length and width were 95.9 and 28.7 mm, respectively; both positively correlated with the altitude of origin of the population. The average potential number of seeds per strobilus was 89, of which 59.0 % were aborted ovules, 22.6 % empty seeds, 0.9 % plagued seeds and 17.5 % filled seeds, which indicates a low efficiency of seed production (1 to 16 filled seeds per cone). The high percentage of aborted ovules indicates pollination problems associated with the small size of the populations. A reproductive efficiency of 25.6 mg of seed per gram of strobilus was found. The seed showed a germination capacity of 75.7 %, a peak value of 3.74 % per day and a germinative value of 9.74 Despite the low production of filled seeds and the high percentage of empty seeds, the evaluated populations produce filled seeds of acceptable germination quality.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Pinus chiapensis]]></kwd>
<kwd lng="es"><![CDATA[características reproductivas]]></kwd>
<kwd lng="es"><![CDATA[especies en riesgo]]></kwd>
<kwd lng="es"><![CDATA[variación morfológica]]></kwd>
<kwd lng="en"><![CDATA[Pinus chiapensis]]></kwd>
<kwd lng="en"><![CDATA[endangered species]]></kwd>
<kwd lng="en"><![CDATA[morphological variation]]></kwd>
<kwd lng="en"><![CDATA[reproductive characteristics]]></kwd>
</kwd-group>
</article-meta>
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