<?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>1659-1321</journal-id>
<journal-title><![CDATA[Agronomía Mesoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Mesoam]]></abbrev-journal-title>
<issn>1659-1321</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-13212024000100017</article-id>
<article-id pub-id-type="doi">10.15517/am.2024.55231</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Inducción de la ovulación con Kisspeptina-10 en un protocolo de sincronización estral en vacas]]></article-title>
<article-title xml:lang="en"><![CDATA[Ovulation induction in cows with Kisspeptin-10 in an estrus synchronization protocol]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosete Fernández]]></surname>
<given-names><![CDATA[Jorge Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fragoso Islas]]></surname>
<given-names><![CDATA[Abraham]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos Echeverría]]></surname>
<given-names><![CDATA[Rubén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos Utrera]]></surname>
<given-names><![CDATA[Ángel]]></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 Sitio Experimental Las Margaritas ]]></institution>
<addr-line><![CDATA[Hueytamalco Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Sitio Experimental Las Margaritas ]]></institution>
<addr-line><![CDATA[Hueytamalco Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Centro de Investigación Regional Golfo Centro (CIRGOC) ]]></institution>
<addr-line><![CDATA[Municipio de Medellín Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Veracruzana Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Veracruz Veracruz]]></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>35</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212024000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212024000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212024000100017&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción. En becerras prepúberes, la Kisspeptina-10 ha estimulado la secreción de las hormonas luteinizante (LH) y folículo estimulante (FSH), y en vacas posparto amamantando ha estimulado la secreción de LH sin evidencia de inducir la ovulación. Objetivo. Inducir la ovulación con Kisspeptina-10 u hormona liberadora de gonadotropinas (GnRH), en vacas productoras de carne en condiciones subtropicales de México. Materiales y métodos. El estudio se realizó en la región nororiente del estado de Puebla durante los años 2020 al 2021, con 252 vacas cruzadas Bos taurus x Bos indicus. El protocolo de sincronización estral consistió en la aplicación de un dispositivo intravaginal impregnado con progesterona (1,9 g) y la inyección intramuscular de 2 mg de benzoato de estradiol (día 0). El día siete se removió el dispositivo intravaginal y de inmediato las vacas fueron inyectadas vía intramuscular con 0,150 mg de D-cloprostenol. Al día siguiente (día ocho), las vacas fueron inyectadas vía intramuscular con 1 mg de benzoato de estradiol. Entre 52 y 56 horas posteriores al retiro del dispositivo intravaginal (día nueve), las vacas se inyectaron vía intramuscular con GnRH o Kisspeptina-10. Las vacas se asignaron a cuatro tratamientos: T1, 100 µg de GnRH (control positivo), T2, T3 y T4 500 µg, 1000 µg y 1500 µg de Kisspeptina-10, respectivamente. La ovulación se detectó mediante ultrasonografía a los cuatro días post-tratamiento. La variable de respuesta evaluada fue la tasa de ovulación. Los datos se analizaron mediante modelos lineales generalizados y se aplicó una función liga logit. Resultados. Las tasas de ovulación obtenidas con T1 y T4 fueron iguales estadísticamente (99,9 %; p&gt;0,05) y mayores (p&lt;0,05) que las logradas con T2 (98,5 %) y T3 (88,4 %), estas dos últimas fueron iguales estadísticamente (p&gt;0,05). Conclusión. La Kisspeptina-10 1500 µg fue tan efectiva como la GnRH para inducir la ovulación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction. In prepubertal heifers, Kisspeptin-10 has stimulated the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), and in postpartum lactating cows, it has stimulated LH secretion without evidence of inducing ovulation. Objective. To induce ovulation using Kisspeptin-10 or gonadotropin-releasing hormone (GnRH) in beef-producing cows under subtropical conditions in Mexico. Materials and methods. The study was conducted in the northeastern region of the state of Puebla uring the years 2020 to 2021, with 252 Bos taurus x Bos indicus cows. The estrous synchronization protocol involved the insertion of an intravaginal device impregnated with progesterone (1.9 g) and intramuscular injection of 2 mg of estradiol benzoate (day 0). On day seven, the intravaginal device was removed, and cows were immediately intramuscularly injected with 0.150 mg of D-cloprostenol. On the following day (day eight), Kisspeptin-10 was as effective as GnRH in inducing ovulation. 56 hours after the removal of the intravaginal device (day nine), cows were intramuscularly injected with GnRH or Kisspeptin-10. Cows were assigned to four treatments: T1, 100 µg of GnRH (positive control), T2, T3, and T4 with 500 µg, 1000 µg, and 1500 µg of Kisspeptin-10, respectively. Ovulation was detected via ultrasonography four days post-treatment. The response variable evaluated was the ovulation rate. Data were analyzed using generalized linear models with a logit link function. Results. Ovulation rates obtained with T1 and T4 were statistically equal (99.9%; p&gt;0.05) and higher (p&lt;0.05) than those achieved with T2 (98.5%) and T3 (88.4%), with the latter two being statistically equal (p&gt;0.05). Conclusion. Kisspeptin-10 1500 µg was as effective as GnRH in inducing ovulation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[clima subtropical]]></kwd>
<kwd lng="es"><![CDATA[GnRH]]></kwd>
<kwd lng="es"><![CDATA[inducción al estro]]></kwd>
<kwd lng="es"><![CDATA[péptidos]]></kwd>
<kwd lng="es"><![CDATA[vaca]]></kwd>
<kwd lng="en"><![CDATA[cows]]></kwd>
<kwd lng="en"><![CDATA[GnRH]]></kwd>
<kwd lng="en"><![CDATA[induced ovulation]]></kwd>
<kwd lng="en"><![CDATA[peptides]]></kwd>
<kwd lng="en"><![CDATA[subtropical climate]]></kwd>
</kwd-group>
</article-meta>
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