<?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>S2007-11242015000400431</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores ambientales y parámetros genéticos para algunas características reproductivas en bovinos Chacuba]]></article-title>
<article-title xml:lang="en"><![CDATA[Environmental factors and genetic parameters for some reproductive traits in Chacuba cattle]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinoza Villavicencio]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ceró Rizo]]></surname>
<given-names><![CDATA[Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra Iglesias]]></surname>
<given-names><![CDATA[Danilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palacios Espinosa]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Viveros]]></surname>
<given-names><![CDATA[Joel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Peña Fundora]]></surname>
<given-names><![CDATA[Dianelys]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Baja California Sur  ]]></institution>
<addr-line><![CDATA[La Paz B.C.S.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Camagüey  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Investigación para el Mejoramiento Animal de la Ganadería Tropical  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Chihuahua  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Illinois  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>6</volume>
<numero>4</numero>
<fpage>431</fpage>
<lpage>441</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242015000400431&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242015000400431&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242015000400431&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El objetivo del estudio fue analizar el impacto de factores ambientales, así como estimar componentes de (co)varianza de caracteres reproductivos en el bovino Chacuba. Para ello se utilizaron 4,957 registros de vacas, hijas de 893 madres y 110 sementales. Se probaron modelos que consideraron el número de parto, el sexo del becerro y los grupos de contemporáneas (hato-año-época de parto) como efectos fijos. La época de parto se incluyó como bimestre, trimestre, cuatrimestre o semestre. Los caracteres intervalo parto concepción (IPC), intervalo entre partos (IP) y servicios por concepción (SC) se analizaron con un modelo univariado y multivariado utilizando el programa ASReml. El número de parto (P&lt;0.01) y los grupos de contemporáneas (P&lt;0.001) afectaron significativamente las características reproductivas. Sin embargo, el sexo del becerro (P&gt;0.05) no fue un efecto significativo. Las heredabilidades para los rasgos analizados fueron bajas con valores de 0.14±0.02, 0.15±0.02 y 0.04±0.01 para IPC, IP y SC, respectivamente. Las correlaciones genéticas fueron altas entre IPC e IP (0.99±0.43) pero bajas entre IPC y SC (0.10±0.14) y entre IP y SC (0.09±0.11). Los modelos de estimación de parámetros genéticos para IPC, IP y SC en vacas Chacuba deben considerar el número de parto y los grupos de contemporáneas que incluyan hato-año-bimestre. La selección indirecta para el intervalo entre partos a partir del intervalo parto-concepción puede ser implementada, dada la correlación genética entre estos caracteres.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The aim of the study was to analyze the impact of environmental factors as well as to estimate components of (co) variance of reproductive traits in Chacuba cattle. For that, 4,957 records of cows, daughters of 893 dams and 110 sires were used. Models that considered number of parity, calf sex, and contemporary group (herd-year-season of calving) as fixed effects were tested. The season of calving was included as every two, three, four and six months. The interval from calving to conception (ICC), calving interval (CI), and services per conception (SC) were the traits analyzed with uni and multitrait models using the software ASReml. The parity (P&lt;0.01) and the contemporary groups (P&lt;0.01) significantly affected the reproductive traits; however, the calf sex (P&gt;0.05) was not. The heritability for the traits analyzed were low with values of 0.14±0.02, 0.15±0.02 and 0.04±0.01 for ICC, CI and SC, respectively. Genetic correlations were high between ICC and CI (0.99±0.43) but low between ICC and SC (0.10±0.14) and between CI and SC (0.09±0.11). Genetics parameters estimation models for the traits ICC, CI, and SC for Chacuba cows should consider parity and herd-year-quarter contemporary groups. Indirect selection for the calving interval using the interval calving-conception, can be implemented given the genetic correlation between these traits.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bovino Chacuba]]></kwd>
<kwd lng="es"><![CDATA[Heredabilidad]]></kwd>
<kwd lng="es"><![CDATA[Correlaciones genéticas]]></kwd>
<kwd lng="es"><![CDATA[Intervalo entre partos]]></kwd>
<kwd lng="es"><![CDATA[Intervalo parto-concepción]]></kwd>
<kwd lng="es"><![CDATA[Servicios por concepción]]></kwd>
<kwd lng="en"><![CDATA[Chacuba]]></kwd>
<kwd lng="en"><![CDATA[Heritability]]></kwd>
<kwd lng="en"><![CDATA[Genetic correlation]]></kwd>
<kwd lng="en"><![CDATA[Calving to conception]]></kwd>
<kwd lng="en"><![CDATA[Calving interval]]></kwd>
<kwd lng="en"><![CDATA[Services per conception]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Desempenho de vacas de corte Purunã submetidas a diferentes manejos de amamentação]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moura]]></surname>
<given-names><![CDATA[ICF]]></given-names>
</name>
<name>
<surname><![CDATA[Kuss]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Moletta]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[de Menezes]]></surname>
<given-names><![CDATA[LF]]></given-names>
</name>
<name>
<surname><![CDATA[Henrique]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Lipinski]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Pesq Agropec Bras]]></source>
<year>2014</year>
<volume>49</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>49-56</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[GL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Physiology and management of the postpartum suckled cow for controlled breeding programs]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[GL]]></given-names>
</name>
<name>
<surname><![CDATA[Forrest]]></surname>
<given-names><![CDATA[DW]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc Applied reproductive strategies in beef cattle]]></source>
<year>2005</year>
<page-range>184-96</page-range><publisher-loc><![CDATA[USA ]]></publisher-loc>
<publisher-name><![CDATA[Texas A&M University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Reproductive efficiency of Nellore cows nursing Nellore or crossbred Simmental × Nellore calves]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Miranda]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Wechsler]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Morais]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[de]]></given-names>
</name>
<name>
<surname><![CDATA[Mendes]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
<name>
<surname><![CDATA[Rossi]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2013</year>
<volume>42</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>475-80</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores genético-ambientales que afectan el intervalo entre partos y días al primer parto del ganado de doble propósito en el norte de Veracruz]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arellano]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Romero]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Briones]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Domínguez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[de la Garza]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev AIA]]></source>
<year>2006</year>
<volume>10</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>43-53</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic and biological aspects of Zebu adaptability]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Turner]]></surname>
<given-names><![CDATA[JW]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>1980</year>
<volume>50</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1201-5</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic and environmental effects on sexual precocity traits in Nellore cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meirelles]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Espasandin]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
<name>
<surname><![CDATA[Mattar]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[de Queiroz]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2009</year>
<volume>38</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1488-93</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Componentes de (co)varianza para caracteres de crecimiento y reproducción en ganado cebú en Cuba]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Espinoza]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Palacios]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[de Luna]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Guerra]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[González-Peña]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<source><![CDATA[Arch Zootec]]></source>
<year>2007</year>
<volume>56</volume>
<numero>216</numero>
<issue>216</issue>
<page-range>919-27</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic analysis of days open in beef cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Goyache]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Royo]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Prod Sci]]></source>
<year>2005</year>
<volume>93</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>283-9</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Componentes de (co)varianza de caracteres reproductivos y su relación genética con el peso al destete en ganado Cebú de Cuba]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Luna]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Guerra]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[González-Peña]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Espinoza]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Palacios]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Tec Pecu Mex]]></source>
<year>2008</year>
<volume>46</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>225-34</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<collab>CITMA</collab>
<source><![CDATA[Diagnóstico ambiental de la cuenca del río San Pedro en Camagüey Cuba. Centro de investigaciones de medio ambiente de Camagüey]]></source>
<year>2003</year>
<publisher-loc><![CDATA[La Habana, Cuba ]]></publisher-loc>
<publisher-name><![CDATA[Ministerio de la Ciencia, Tecnología y Medio Ambiente de Cuba]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<collab>SAS</collab>
<source><![CDATA[SAS/STAT User&#8217;s Guide (Release 8.2)]]></source>
<year>2001</year>
<publisher-loc><![CDATA[Cary NC, USA ]]></publisher-loc>
<publisher-name><![CDATA[SAS Inst. Inc.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guilmour]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
<name>
<surname><![CDATA[Cullis]]></surname>
<given-names><![CDATA[BR]]></given-names>
</name>
<name>
<surname><![CDATA[Erlham]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[Thompson]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[ASREML Reference Manual]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Australia ]]></publisher-loc>
<publisher-name><![CDATA[NSW Agriculture]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Intervalo de partos de fêmeas bovinas Nelore, Guzerá x Nelore, Red Angus x Nelore, Marchigiana x Nelore e Simental x Nelore]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perotto]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Abrahäo]]></surname>
<given-names><![CDATA[JJ]]></given-names>
</name>
<name>
<surname><![CDATA[Kroetz]]></surname>
<given-names><![CDATA[IA]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2006</year>
<volume>35</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>733-41</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Parâmetros genéticos e fenotípicos do desempenho reprodutivo de fêmeas Chianina]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Azevedo]]></surname>
<given-names><![CDATA[DM]]></given-names>
</name>
<name>
<surname><![CDATA[Filho]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Bozzi]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Forabosco]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Malhado]]></surname>
<given-names><![CDATA[CH]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2006</year>
<volume>35</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>982-7</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Santana]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<source><![CDATA[Factores genéticos y no genéticos que afectan los caracteres reproductivos en la hembra Cebú]]></source>
<year>2004</year>
<publisher-loc><![CDATA[La Habana, CU ]]></publisher-loc>
<publisher-name><![CDATA[Centro de Investigaciones para el Mejoramiento Animal]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montaldo]]></surname>
<given-names><![CDATA[HH]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[SG]]></given-names>
</name>
<name>
<surname><![CDATA[Román-Ponce]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz-López]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo-Juárez]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Román-Ponce]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Crossbreeding effects for milk production and reproduction traits in a Multibreed cattle population in Mexico]]></source>
<year>2006</year>
<conf-name><![CDATA[ World Cong Genetics Applied Livest Prod]]></conf-name>
<conf-loc>Belo Horizonte, MG, Brasil </conf-loc>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimación de la heredabilidad del intervalo de partos en bovinos cruzados]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vergara]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Cerón]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hurtado]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Arboleda]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Granada]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Rúa]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev MVZ Córdoba]]></source>
<year>2008</year>
<volume>13</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1192-6</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Falcón]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Guerra]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Veliz]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Santana]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Ortiz]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio de los factores genéticos y ambientales que influyen sobre algunos índices reproductivos en novillas de la raza Cebú]]></source>
<year>2005</year>
<conf-name><![CDATA[ Congreso internacional sobre mejoramiento animal]]></conf-name>
<conf-loc>La Habana, Cuba </conf-loc>
<page-range>1098-102</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guerra]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[González-Peña]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Planas]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<source><![CDATA[Estimación de componentes de (co)varianzas de rasgos de crecimiento y reproductivos en el ganado Cebú Cubano]]></source>
<year>2005</year>
<conf-name><![CDATA[ Congreso internacional sobre mejoramiento animal]]></conf-name>
<conf-loc>La Habana, Cuba </conf-loc>
<page-range>1070-2</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores ambientales y genéticos relacionados con el intervalo entre partos en la raza Romosinuano]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ossa]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Suárez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev MVZ Córdoba]]></source>
<year>2006</year>
<volume>11</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>799-805</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores ambientales y genéticos que influyen en el intervalo entre partos y el peso al nacer del ganado Cebú en el sureste de México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Magaña]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Segura]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev Cubana Cienc Agríc]]></source>
<year>2002</year>
<volume>36</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>317-22</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Índices reprodutivos do rebanho Nelore da fazenda Nhumirim, Pantanal da Nhecolândia]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Batista]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[de Abreu]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
<name>
<surname><![CDATA[Ferraz]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Rosa]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Acta Scientiarum Anim Sci]]></source>
<year>2012</year>
<volume>34</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>71-6</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores ambientales que afectan la edad al primer parto y primer intervalo de partos en vacas del sistema doble propósito]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vergara]]></surname>
<given-names><![CDATA[OG]]></given-names>
</name>
<name>
<surname><![CDATA[Botero]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev MVZ Córdoba]]></source>
<year>2009</year>
<volume>14</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1594-601</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Calving sub-season and reproductive efficiency of beef cows]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reinher]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Jardim]]></surname>
<given-names><![CDATA[JO]]></given-names>
</name>
<name>
<surname><![CDATA[Peripolli]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Rosa]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Andrighetto]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2010</year>
<volume>39</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>2182-6</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Pre- and post-calving forage systems and reproductive performance of primiparous cows]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Piva]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
<name>
<surname><![CDATA[Menegaz]]></surname>
<given-names><![CDATA[AL]]></given-names>
</name>
<name>
<surname><![CDATA[Gonçalves]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2010</year>
<volume>39</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>2081-90</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimativas de parámetros genéticos e fenotípicos de características do pelame e de desempenho reprodutivo de vacas holandesas em clima tropical]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bertipaglia]]></surname>
<given-names><![CDATA[EC]]></given-names>
</name>
<name>
<surname><![CDATA[Gomes da Silva]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Cardoso]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Campos]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2007</year>
<volume>36</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>350-9</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Componentes de (co)varianza de los días abiertos en bovinos Santa Gertudis]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guerra]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Espinoza]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Palacios]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[González-Peña]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Guillén]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Tec Pecu Mex]]></source>
<year>2009</year>
<volume>47</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>145-55</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Efeitos genéticos aditivos e não-aditivos para características produtivas e reprodutivas em vacas mestiças Holandês x Gir]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Facó]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Braga]]></surname>
<given-names><![CDATA[RN]]></given-names>
</name>
<name>
<surname><![CDATA[Filho]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
<name>
<surname><![CDATA[Pinheiro]]></surname>
<given-names><![CDATA[SM]]></given-names>
</name>
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[DM]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2008</year>
<volume>37</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>48-53</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Una nota sobre la estimación de la heredabilidad del intervalo entre partos en hembras bovinas de ganado Brahman]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montes]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Vergara]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Prieto]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Res Rural Devel]]></source>
<year>2009</year>
<volume>21</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Fatores ambientais e pârametros genéticos para características produtivas e reprodutivas em um rebanho Nelore no Estado do Mato Grosso do Sul]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silveira]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[McManus]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mascioli]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[LO]]></given-names>
</name>
<name>
<surname><![CDATA[Silveira]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<source><![CDATA[R. Bras Zootec]]></source>
<year>2004</year>
<volume>33</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1432-44</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic and environmental variance and covariance parameters for some reproductive traits of Holstein and Jersey cattle in Antioquia (Colombia)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zambrano]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<name>
<surname><![CDATA[Echeverri]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2014</year>
<volume>43</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>132-9</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Performance and genetic parameters for fertility of seasonal dairy cows in New Zealand]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Grosshans]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[ZZ]]></given-names>
</name>
<name>
<surname><![CDATA[Burton]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Johnson]]></surname>
<given-names><![CDATA[DL]]></given-names>
</name>
<name>
<surname><![CDATA[MacMillan]]></surname>
<given-names><![CDATA[KL]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Prod Sci]]></source>
<year>1997</year>
<volume>51</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>41-51</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
