<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282018000200327</article-id>
<article-id pub-id-type="doi">10.19136/era.a5nl4.1425</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto del grupo genético sobre características de la curva de lactación ovina]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of genetic group on characteristics of the ovine lactation curve]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ángeles-Hernández]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero-Loredo]]></surname>
<given-names><![CDATA[Araceli]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solís-Guzmán]]></surname>
<given-names><![CDATA[Diana Arely]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Pérez]]></surname>
<given-names><![CDATA[Aurora Hilda]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ángeles-Campos]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Ronquillo]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia Departamento de Nutrición Animal y Bioquímica]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Toluca Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Medicina Veterinaria y Zootecnia Departamento de Nutrición Animal]]></institution>
<addr-line><![CDATA[Toluca Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>5</volume>
<numero>14</numero>
<fpage>327</fpage>
<lpage>333</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282018000200327&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282018000200327&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282018000200327&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN: El objetivo del estudio fue analizar la producción de leche y las características de la curva de lactación de grupos genéticos ovinos. Se analizaron 863 registros semanales de producción de 70 lactaciones de seis grupos genéticos: East Friesian (EF), Criollo (Cr), EF ½ Cr ½ (EF50Cr50), EF 3/4 Cr ¼ (EF75Cr25), Suffolk ½ Cr ½ (Suffolk50Cr50), y Corriedale (C). Se utilizó la función de Wood (WD) para estimar la producción láctea total observada (PLT obs ) y estimada a los 180 d (PLT180), pico de lactación (PL), tiempo al pico de lactación (tPL) y persistencia (Per). El grupo genético influyó de forma significativa (p &lt; 0.05) sobre la PLT obs , PLT180, PL y parámetro b del modelo de WD, con valores superiores en las ovejas EF50Cr50. Las diferencias en el desempeño productivo con el grupo genético pueden estar asociadas con la capacidad de adaptación de las ovejas EF a las condiciones climáticas locales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT: The objective of the study was to analyze the milk production and characteristics of the lactation curve of ovine genetic groups. We analyzed 863 weekly production records of 70 lactations of six genetic groups: East Friesian (EF), Criollo (Cr), EF ½ Cr ½ (EF50Cr50), EF 3/4 Cr ¼ (EF75Cr25), Suffolk ½ Cr ½ (Suffolk50Cr50), and Corriedale (C). Wood's function (WD) was used to estimate the total observed milk production (TMP obs ) and estimated at 180 d (TMP180), lactation peak (LP), time to lactation peak (tLP) and persistence (Per). The genetic group had a significant influence (p &lt; 0.05) on tTMP obs , TMP180, LP and parameter b of the WD model, with higher values in the EF50Cr50 sheep. The differences in productive performance with the genetic group may be associated with the adaptability of EF sheep to local climatic conditions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[East Friesian]]></kwd>
<kwd lng="es"><![CDATA[modelo de Wood]]></kwd>
<kwd lng="es"><![CDATA[ovejas lecheras]]></kwd>
<kwd lng="es"><![CDATA[persistencia]]></kwd>
<kwd lng="es"><![CDATA[pico de lactancia]]></kwd>
<kwd lng="en"><![CDATA[East Friesian]]></kwd>
<kwd lng="en"><![CDATA[Wood model]]></kwd>
<kwd lng="en"><![CDATA[dairy sheep]]></kwd>
<kwd lng="en"><![CDATA[persistence]]></kwd>
<kwd lng="en"><![CDATA[lactation peak]]></kwd>
</kwd-group>
</article-meta>
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