<?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>2079-3480</journal-id>
<journal-title><![CDATA[Cuban Journal of Agricultural Science]]></journal-title>
<abbrev-journal-title><![CDATA[Cuban J. Agric. Sci.]]></abbrev-journal-title>
<issn>2079-3480</issn>
<publisher>
<publisher-name><![CDATA[Editorial del Instituto de Ciencia Animal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2079-34802023000100013</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Implications of sexual reproduction of Tithonia diversifolia for implementing intensive silvopastoral systems]]></article-title>
<article-title xml:lang="es"><![CDATA[Implicaciones de la reproducción sexual de Tithonia diversifolia en la implementación de sistemas silvopastoriles intensivos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos-Gally]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México CONACYT-Instituto de Ecología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>57</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802023000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802023000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802023000100013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Conventional cattle breeding, from pasture to free-range, is one of the primary contributors to global environmental problems, including deforestation, climate change, and biodiversity loss, thereby representing an unsustainable production form. As a response, intensive silvopastoral systems combining purposely cattle and different plant strata (pastures, grasses, shrubs, palms and/or trees) have increased in Latin America. These systems increase forage supply and soil quality, promote greater diversity in organisms, and enhance animal welfare, which involves a sustainable agricultural practice. The use of Tithonia diversifolia as forage shrub represents a source rich in proteins and phosphorus for cattle. Its use raises incomes, due to higher productivity. The spread of T. diversifolia has been conducted primarily in a vegetative form, which translates into higher implementation costs, genetic variability reduction, and plants of feebler and more superficial roots. Seed sowing could optimize its use in intensive silvopastoral systems, being crucial to identify this species reproductive condition. Likewise, getting to know fruit heteromorphism variability (two forms in the individual) at population level may provide standards for the correct planning of seed collections. This study compiles outcomes on sexual reproduction and fruit heteromorphism in T. diversifolia, permitting to gain knowledge on the plant and its effect on the implementation of intensive silvopastoral systems.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[La ganadería convencional, de pastos a cielo abierto, es una de las principales contribuyentes a los problemas ambientales globales, incluida la deforestación, el cambio climático y la pérdida de biodiversidad, por lo que representa una forma insostenible de producción. Como respuesta a esto, los sistemas silvopastoriles intensivos, que integran intencionalmente el ganado y diferentes estratos de vegetación (pastos, herbáceas, arbustos, palmeras y/o árboles), se han ido incrementando en América Latina. Estos sistemas aumentan la oferta forrajera y la calidad del suelo, fomentan mayor diversidad de organismos, y mejoran el bienestar animal, lo que conlleva a una práctica agropecuaria sostenible. El uso de Tithonia diversifolia como arbustiva forrajera representa una fuente rica en proteínas y fósforo para el ganado. Con su utilización se incrementan los ingresos, debido a la mayor productividad. La propagación de T. diversifolia se ha realizado principalmente de forma vegetativa, lo que se traduce en mayores costos de implementación, reducción de la variabilidad genética y plantas con raíces más débiles y superficiales. La siembra mediante semillas optimizaría su uso en sistemas silvopastoriles intensivos, por lo que es crucial identificar la condición reproductiva de la especie. Asimismo, conocer la variabilidad del heteromorfismo de los frutos (dos formas dentro del mismo individuo) a nivel poblacional, puede ofrecer pautas para la correcta planificación de colectas de semillas. En este trabajo se compilan resultados relacionados con la reproducción sexual y heteromorfismo del fruto en T. diversifolia, de manera que permitan incrementar el conocimiento sobre la planta y su repercusión en la implementación de SSPi.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Asteracea]]></kwd>
<kwd lng="en"><![CDATA[sustainable cattle breeding]]></kwd>
<kwd lng="en"><![CDATA[fruit heteromorphism]]></kwd>
<kwd lng="en"><![CDATA[manual crossing]]></kwd>
<kwd lng="en"><![CDATA[incompatibility system]]></kwd>
<kwd lng="en"><![CDATA[pollinators]]></kwd>
<kwd lng="es"><![CDATA[Asterácea]]></kwd>
<kwd lng="es"><![CDATA[ganadería sostenible]]></kwd>
<kwd lng="es"><![CDATA[heteromorfismo de fruto]]></kwd>
<kwd lng="es"><![CDATA[cruzamientos manuales]]></kwd>
<kwd lng="es"><![CDATA[sistema de incompatibilidad]]></kwd>
<kwd lng="es"><![CDATA[polinizadores]]></kwd>
</kwd-group>
</article-meta>
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