<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242020000200380</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v11i2.5152</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tendencias genéticas y fenotípicas para pico productivo, rendimiento lechero y persistencia de lactación en la raza Murciano-Granadina]]></article-title>
<article-title xml:lang="en"><![CDATA[Phenotypic and genetic trends for peak yield, milk yield, and lactation persistency in the Murciano-Granadina breed]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Miranda Alejo]]></surname>
<given-names><![CDATA[Judith Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León Jurado]]></surname>
<given-names><![CDATA[José Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pieramati]]></surname>
<given-names><![CDATA[Camillo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez Carpio]]></surname>
<given-names><![CDATA[Mayra Mercedes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdés Hernández]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barba Capote]]></surname>
<given-names><![CDATA[Cecilio José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Córdoba Departamento de Producción Animal ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Córdoba Departamento de Genética ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Università Degli Studi di Perugia Dipartimento di Medicina Veterinaria ]]></institution>
<addr-line><![CDATA[Perugia ]]></addr-line>
<country>Italy</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Barcelona Departamento de Ciencia Animal y de los Alimentos Centre for Research in Agricultural Genomics]]></institution>
<addr-line><![CDATA[Barcelona ]]></addr-line>
<country>España</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Delegación de Agricultura y Medio Ambiente Centro Agropecuario Provincial ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>380</fpage>
<lpage>392</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242020000200380&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242020000200380&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242020000200380&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue evaluar las tendencias genéticas (TG) y fenotípicas (TF) para los caracteres de pico productivo (PP), rendimiento lechero (RL) y persistencia de la lactación (P) en la curva de lactación de la raza Murciano-Granadina (MG). Para ello se utilizaron 180,872 lactaciones, de 85,404 cabras (registros históricos de 1990-2012). Para la obtención de los caracteres de interés (PP, RL y P) se realizó la biomodelación de curvas de lactación mediante el modelo Spline usando el software &#8220;R&#8221;. Los valores genéticos (VG) se obtuvieron mediante modelo animal univariado con observaciones repetidas, empleándose el paquete MTDFREML. Las TG y TF se estimaron vía mínimos cuadrados en una regresión del promedio de los VG e información productiva conocida según el año de nacimiento. En el cálculo de las TG y TF se obtuvieron coeficientes de regresión lineal (b), donde los valores b para PP, RL y P fueron de +0.00071, +0.00698; +0.00114, +0.01117 y +0.00002, -0.00076; respectivamente. El trayecto de TG, TF de PP y RL se comportó de la misma manera siguiendo una línea de tendencia ascendente con presencia de intervalos de crecimiento y decrecimiento. La TG de P mostró un comportamiento estacional y la TF fue descendente con puntos más consistentes en su recorrido; reforzando la idea de que altas producciones van en detrimento de la P. Estos resultados permiten informar a los criadores del comportamiento de estos caracteres y considerar la incorporación de la persistencia de la lactación como criterio de selección en el programa genético de la raza.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study evaluated the genetic (TG) and phenotypic (TF) trends for the peak yield (PP), milk yield (RL), and lactation persistency (P) traits of the Murciano-Granadina (MG) goat lactation curve obtained from 80,872 lactations of 85,404 goats (historical records from 1990-2012). The biomodelling of lactation curves allowed us to estimate the PP, RL, and P traits using the Spline model in the &#8220;R&#8221; software. The genetic values (VGs) were obtained using the univariate animal model with repeated observations, employing the MTDFREML package. The TG and TF were estimated via the least-squares regression of the average of VGs and known yield information according to the year of birth. While calculating the TG and TF, linear regression coefficients (b) were obtained, where the b values for PP, RL, and P were +0.00071, +0.00698; +0.00114, +0.01117; and +0.00002, -0.00076, respectively. The TG and TF for the PP and RL behaved similarly following an upward trend line with increasing and decreasing intervals. The TG for P showed seasonal variations while the TF followed a downward trend with more consistent points in its trajectory; supporting the idea that high yields are detrimental to the P. These results inform the breeders about the behavior of these traits and provide the basis for the incorporation of the lactation persistency as a selection criteria in the genetic program of the MG breed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Programa de cría]]></kwd>
<kwd lng="es"><![CDATA[Cabra]]></kwd>
<kwd lng="es"><![CDATA[Leche]]></kwd>
<kwd lng="es"><![CDATA[Valores genéticos]]></kwd>
<kwd lng="en"><![CDATA[Breeding program]]></kwd>
<kwd lng="en"><![CDATA[Goat]]></kwd>
<kwd lng="en"><![CDATA[Milk]]></kwd>
<kwd lng="en"><![CDATA[Genetic value]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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