<?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>1027-152X</journal-id>
<journal-title><![CDATA[Revista Chapingo. Serie horticultura]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo Ser.Hortic]]></abbrev-journal-title>
<issn>1027-152X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1027-152X2021000300185</article-id>
<article-id pub-id-type="doi">10.5154/r.rchsh.2021.03.006</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Study of inbreeding in tomatillo (Physalis ixocarpa Brot. ex Horm.)]]></article-title>
<article-title xml:lang="es"><![CDATA[Estudio de la endogamia en tomate de cáscara (Physalis ixocarpa Brot. ex Horm.)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrera-Irigoyen]]></surname>
<given-names><![CDATA[César Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peña-Lomelí]]></surname>
<given-names><![CDATA[Aureliano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magaña-Lira]]></surname>
<given-names><![CDATA[Natanael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sahagún-Castellanos]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Grajales]]></surname>
<given-names><![CDATA[Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>27</volume>
<numero>3</numero>
<fpage>185</fpage>
<lpage>198</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1027-152X2021000300185&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1027-152X2021000300185&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1027-152X2021000300185&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Only intervarietal and interfamilial hybridization can be carried out in tomatillo. Therefore, the objective was to study the effect of inbreeding in families of four varieties of tomatillo obtained through three generations of mating by fraternal and plant-to-plant crosses. The varieties studied were Tecozautla, Diamante, Manzano and Morado, each represented by three maternal half-sib families (Generation 1). In 2018, plant-to-plant and fraternal crosses were made in selected plants within each family, resulting in full-sib (FSF) and maternal half-sib (MHSF) families, respectively (Generation 2). In 2019, the process was repeated in Generation 2 families, and another generation of FSFs and MHSFs (Generation 3) was obtained. Field evaluation was conducted in 2020. A randomized complete block design with four replications was used, and yield per plant was evaluated in two harvests and total yield per plant, as well as fruit weight, volume and bulk density, in each harvest and average of harvests. Inbreeding depression occurred among generations. Fruit yield, size and volume in the first harvest decreased over generations. The Tecozautla and Diamante varieties showed greater inbreeding depression. The type of cross had a different effect depending on the variety. Fruit size was lower in plant-to-plant crosses in Tecozautla, Diamante and Morado; that is, they generated greater inbreeding depression than the fraternal crosses.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En tomate de cáscara sólo se puede hacer hibridación intervarietal e interfamilial. Por ello, el objetivo fue estudiar el efecto de la endogamia en familias de cuatro variedades de tomate de cáscara obtenidas a través de tres generaciones de apareamiento por cruzas fraternales y planta a planta. Las variedades estudiadas fueron Tecozautla, Diamante, Manzano y Morado, cada una representada por tres familias de medios hermanos maternos (Generación 1). En 2018 se realizaron cruzas planta a planta y fraternales en plantas seleccionadas dentro de cada familia, lo que dio origen a familias de hermanos completos (FHC) y medios hermanos maternos (FMHM), respectivamente (Generación 2). En 2019, el proceso se repitió en las familias de la Generación 2, y se obtuvo otra generación de FHC y FMHM (Generación 3). La evaluación en campo se realizó en 2020. Se usó un diseño de bloques completos al azar con cuatro repeticiones, y se evaluó el rendimiento por planta en dos cortes y total, así como el peso, el volumen y la densidad aparente de frutos, en cada corte y promedio de cortes. Se presentó depresión endogámica entre generaciones. El rendimiento, el tamaño y el volumen de fruto en el primer corte disminuyó con el paso de las generaciones. Las variedades Tecozautla y Diamante presentaron mayor depresión endogámica. El tipo de cruza tuvo un efecto diferente en función de la variedad. El tamaño de fruto fue inferior en cruzas planta a planta en Tecozautla, Diamante y Morado; es decir, generaron mayor depresión endogámica que las cruzas fraternales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[inbreeding depression]]></kwd>
<kwd lng="en"><![CDATA[mating systems]]></kwd>
<kwd lng="en"><![CDATA[half-sib families]]></kwd>
<kwd lng="en"><![CDATA[full-sib families]]></kwd>
<kwd lng="es"><![CDATA[depresión endogámica]]></kwd>
<kwd lng="es"><![CDATA[sistemas de apareamiento]]></kwd>
<kwd lng="es"><![CDATA[familias de medios hermanos]]></kwd>
<kwd lng="es"><![CDATA[familias de hermanos completos]]></kwd>
</kwd-group>
</article-meta>
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