<?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>2027-4297</journal-id>
<journal-title><![CDATA[Revista colombiana de ciencia animal recia]]></journal-title>
<abbrev-journal-title><![CDATA[rev. colombiana cienc. anim. Recia]]></abbrev-journal-title>
<issn>2027-4297</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sucre, Facultad de Ciencias Agropecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2027-42972018000100068</article-id>
<article-id pub-id-type="doi">10.24188/recia.v10.n1.2018.632</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Parâmetros e tendências genéticas para peso ao sobreano de animais Nelore criados no estado do Paraná, Brasil]]></article-title>
<article-title xml:lang="en"><![CDATA[Parameters and genetic trends for weight at yearling Nellore animals raised in the Parana state, Brazil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[Júlio Cesar de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Resende]]></surname>
<given-names><![CDATA[Marcos Paulo Gonçalves de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Luiz Otavio Campos da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gusmão]]></surname>
<given-names><![CDATA[Marco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gondo]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mota]]></surname>
<given-names><![CDATA[Marcelo Falci]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Freitas]]></surname>
<given-names><![CDATA[José Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Rosana Moreira da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal de Mato Grosso do Sul  ]]></institution>
<addr-line><![CDATA[Campo Grande Mato Grosso do Sul]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Estadual do Sudoeste da Bahia  ]]></institution>
<addr-line><![CDATA[Jequie Bahia]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Empresa Brasileira de Pesquisa Agropecuária - Gado de Corte  ]]></institution>
<addr-line><![CDATA[Campo Grande Mato Grosso do Sul]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Médico Veterinário Autônomo  ]]></institution>
<addr-line><![CDATA[Rondonópolis Mato Grosso]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidade Federal da Fronteira Sul  ]]></institution>
<addr-line><![CDATA[Realeza Paraná]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidade Federal do Paraná  ]]></institution>
<addr-line><![CDATA[Palotina Paraná]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidade Estadual de Mato Grosso do Sul  ]]></institution>
<addr-line><![CDATA[Aquidauana Mato Grosso do Sul]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>10</volume>
<numero>1</numero>
<fpage>68</fpage>
<lpage>73</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2027-42972018000100068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2027-42972018000100068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2027-42972018000100068&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO Objetivou-se avaliar os efeitos de meio e estimar os parâmetros e tendência genética para peso aos 365 e 550 dias de animais da raça Nelore criados no estado do Paraná. Utilizou-se do método dos quadrados mínimos, incluindo os efeitos fixos de ano, mês de nascimento, sexo e a co-variável idade da vaca ao parto (linear e quadrática). Os parâmetros genéticos foram estimados utilizando-se um modelo animal que continha os efeitos aleatórios genéticos direto e materno, de ambiente permanente e o erro; além do efeito fixo de grupo contemporâneo e da co-variável idade da vaca ao parto. A tendência genética foi obtida por meio de análise de regressão linear do valor genético do animal sobre o ano de nascimento. As herdabilidades diretas foram 0,24±0,03 e 0,35±0,05; as herdabilidades maternas foram 0,08±0,03 e 0,03±0,04, para peso aos 365 e 550 dias, respectivamente. As tendências genéticas direta e materna foram 0,506 kg/ano e -0,184 kg/ano para P365; e 0,712 kg/ano e 0,187 kg/ano para P550. Os resultados indicam a existência de variabilidade genética o que possibilitam ganhos através de seleção.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Environmental effects and genetic parameters were estimated for weights at 365 and 550 days for Nellore cattle raised in the Parana State. Least Squared Means methodology, was used to estimate environmental effects. The model included as fixed effects year and month of birth calf, sex and age of dam at calving as a covariate and error as random effects. The variance components were estimated using an animal model considered as fixed effects contemporary group and age of dam. As random effect were composite of direct and maternal genetic additive effects and permanent environment. The genetic trends for direct and maternal effects were estimated by the regression of annual breeding value means on the animals&#8217; year of birth. The heritability were 0.24±0.03 and 0.35±0.05 for direct genetic effect and 0.08±0.03 and 0.03±0.04 for maternal heritability for weights at 365 and 550 days, respectively. The genetic trends of the direct and maternal effects were 0.506 kg/year and -0.184 kg/year for weights at 365 days; and 0.712 kg/year and 0.187 kg/year for weights at 550 days. The results indicate the existence of adequate genetic variability to enable successful selection of breeding stock and realization of genetic gain.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[gado de corte]]></kwd>
<kwd lng="pt"><![CDATA[herdabilidade]]></kwd>
<kwd lng="pt"><![CDATA[zebu]]></kwd>
<kwd lng="en"><![CDATA[beef cattle]]></kwd>
<kwd lng="en"><![CDATA[heritability]]></kwd>
<kwd lng="en"><![CDATA[zebu]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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