<?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>2007-0705</journal-id>
<journal-title><![CDATA[Nova scientia]]></journal-title>
<abbrev-journal-title><![CDATA[Nova scientia]]></abbrev-journal-title>
<issn>2007-0705</issn>
<publisher>
<publisher-name><![CDATA[Universidad de La Salle Bajío A. C., Coordinación de Investigación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-07052016000200181</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis del crecimiento predestete de corderos Barbados Barriga Negra en clima cálido húmedo]]></article-title>
<article-title xml:lang="en"><![CDATA[Preweaning growth analysis of Blackbelly lambs in hot humid weather]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Domínguez]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hinojosa-Cuéllar]]></surname>
<given-names><![CDATA[José Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliva-Hernández]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Hernández]]></surname>
<given-names><![CDATA[Glafíro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Segura-Correa]]></surname>
<given-names><![CDATA[José Candelario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Garduño]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Osorio]]></surname>
<given-names><![CDATA[Irma del Carmen]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Popular de la Chontalpa  ]]></institution>
<addr-line><![CDATA[Cárdenas Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental Huimanguillo ]]></institution>
<addr-line><![CDATA[Huimanguillo Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Yucatán  ]]></institution>
<addr-line><![CDATA[ Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma de Chapingo URUSSE ]]></institution>
<addr-line><![CDATA[ Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<volume>8</volume>
<numero>17</numero>
<fpage>181</fpage>
<lpage>197</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-07052016000200181&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-07052016000200181&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-07052016000200181&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Con el objetivo de estimar los efectos genéticos y ambientales sobre las variables peso al nacer (PN), peso al destete ajustado (PDA) y ganancia diaria de peso (GDP) predestete, en corderos Barbados Barriga Negra (Blackbelly) en clima Af(m) cálido húmedo, se realizó un estudio retrospectivo observacional en una finca del municipio de Centro, Tabasco, México. También se estimaron las heredabilidades del PN y PDA y se efectuó una prueba de progenie de sementales. De los registros de producción se tomaron 650 datos de PN y 445 de PDA y GDP predestete correspondientes a las pariciones de ovejas en los años 2000, 2002 y 2004. El peso al destete y la GDP fueron ajustados a 102 d de edad. Se hicieron dos análisis: en el primero se utilizó un modelo que incluía los efectos fijos de sexo del cordero (hembra y macho), tipo de nacimiento del cordero (sencillo y múltiple), número de parto (primíparas y multíparas) y el efecto de sementales, mientras que el año-estación fungió como factor de bloqueo. En el segundo análisis se utilizó un modelo mixto que incluyó los efectos fijos anteriores y el efecto aleatorio de semental (ocho para PN y siete para GDP y PDA) dentro de año-estación. Todas las variables independientes afectaron el PN (P&lt;0.01). El semental afectó la GDP y el PDA (P &lt; 0.01). El PDA estuvo afectado por el número de parto. Los corderos provenientes de ovejas multíparas tuvieron un mayor PN y PDA que los corderos de ovejas primíparas. En la población de animales estudiados, los valores de heredabilidad estimados fueron 0.16±0.05 y 0.48±0.03 para el PN y PDA, respectivamente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract To estimate genetic, non-genetic and environmental effects on the response variables birth weight (BW), adjusted weaning weight (AWW) and preweaning average daily gain (ADG) in Blackbelly lambs in Af(m) warm-humid climate, a retrospective observational study of a farm of Tabasco state, Mexico was carried out. Heritabilities of BW and AWW were estimated and a progeny test of sires was performed. Records of 650 BW, 445 AWW and the ADG were used from years 2000, 2002 and 2004. WW and ADG were adjusted to 102 d of age. Two analyzes were made: the first model included the fixed effects of sex (male and female), type of birth (single and multiple), number of parity (primiparous and multiparous), the sire effect and year-season as a blocking factor. In the second analysis, a mixed model that included the above fixed effects and the random effect of sire (eight to BW and seven to ADG and AWW) within year-season was used. All independent variables affected the BW (P &lt; 0.01). The sires affected preweaning ADG and AWW (P&lt;0.01). The AWW was affected by number of parity. Lambs from multiparous ewes were heavier at birth and weaning with respect to lambs from primiparous. In the studied animal population, the estimated heritabilities values were 0.16±0.05 and 0.48±0.03 for BW and AWW, respectively.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ovinos de pelo]]></kwd>
<kwd lng="es"><![CDATA[trópico húmedo]]></kwd>
<kwd lng="es"><![CDATA[lactancia]]></kwd>
<kwd lng="es"><![CDATA[heredabilidad]]></kwd>
<kwd lng="en"><![CDATA[Hair sheep]]></kwd>
<kwd lng="en"><![CDATA[humid tropic]]></kwd>
<kwd lng="en"><![CDATA[lactation]]></kwd>
<kwd lng="en"><![CDATA[heritability]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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