<?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>0120-0690</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Colom Cienc Pecua]]></abbrev-journal-title>
<issn>0120-0690</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias Agrarias, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-06902019000400248</article-id>
<article-id pub-id-type="doi">10.17533/udea.rccp.v32n4a01</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Characterization of ruminal bacteria in grazing Nellore steers]]></article-title>
<article-title xml:lang="es"><![CDATA[Caracterización de bacterias ruminales en novillos Nelore en pastoreo]]></article-title>
<article-title xml:lang="pt"><![CDATA[Caraterização bacteriana ruminal em novilhos Nelore em pastejo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de Jesus]]></surname>
<given-names><![CDATA[Raphael B]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Granja-Salcedo]]></surname>
<given-names><![CDATA[Yury T]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Messana]]></surname>
<given-names><![CDATA[Juliana D]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kishi]]></surname>
<given-names><![CDATA[Luciano T]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lemos]]></surname>
<given-names><![CDATA[Eliana G M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[M de Souza]]></surname>
<given-names><![CDATA[Jackson Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Berchielli]]></surname>
<given-names><![CDATA[Telma T]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Estadual Paulista Faculdade de Ciências Agrarias e Veterinárias (FCAV) Departamento de Zootecnia]]></institution>
<addr-line><![CDATA[Jaboticabal SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Estadual Paulista Faculdade de Ciências Agrarias e Veterinárias Departamento de Tecnologia]]></institution>
<addr-line><![CDATA[Jaboticabal SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Estadual Paulista Faculdade de Ciências Agrarias e Veterinárias Departamento de Biologia]]></institution>
<addr-line><![CDATA[Jaboticabal SP]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>32</volume>
<numero>4</numero>
<fpage>248</fpage>
<lpage>260</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-06902019000400248&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-06902019000400248&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-06902019000400248&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  Rumen microorganisms have developed a series of complex interactions, representing one of the best examples of symbiosis between microorganisms in nature. Conventional taxonomic methods based on culture techniques are being replaced by molecular techniques that are faster and more accurate.  Objective:  To characterize rumen bacterial diversity of Nellore steers grazing on tropical pastures by sequencing the 16S rRNA gene using Illumina sequencing.  Methods:  Three rumen-cannulated Nellore steers were used. The liquid and solid fractions of the rumen contents were processed to extract metagenomic DNA, and the V1 and V2 hypervariable regions of the 16S rRNA gene were sequenced using Illumina sequencing.  Results:  A total of 11,407,000 reads of adequate quality were generated, and 812 operational taxonomic units (OTUs) were found at the species level. Twenty-seven phyla were identified, and the predominant phyla were Firmicutes (23%), Bacteroidetes (14%), Proteobacteria (10%), Spirochaetes (9%), Fibrobacteres (7%), Tenericutes (5%), and Actinobacteria (2%), which represented 70% of the total phyla identified in the rumen content.  Conclusion:  Rumen environment in grazing Nellore steers showed high bacterial diversity, with Firmicutes, Bacteroidetes, Proteobacteria, Spirochaetes, and Fibrobacteres as the predominant phyla.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  Los microorganismos ruminales han desarrollado una serie de interacciones complejas que representan uno de los mejores ejemplos de simbiosis entre microorganismos en la naturaleza. Los métodos taxonómicos tradicionales basados en técnicas de cultivo están siendo reemplazados por técnicas moleculares debido a su mayor velocidad y precisión.  Objetivo:  Caracterizar la diversidad bacteriana ruminal de novillos Nelore mantenidos en pasturas tropicales mediante la secuenciación del gen 16S RNA utilizando la plataforma de secuenciación Illumina.  Métodos:  Se utilizaron tres novillos Nelore fistulados en el rumen. Las fracciones líquida y sólida del contenido ruminal fueron procesadas para la extracción del DNA meta genómico y las regiones hipervariables V1 y V2 del gen 16S rRNA fueron secuenciadas usando la plataforma Illumina.  Resultados:  En total, se generaron 11.407.000 lecturas de calidad adecuada, y en el nivel de especie se encontraron 812 unidades taxonómicas operacionales (OTUs). Se identificaron veintisiete filos, predominantemente Firmicutes (23%), Bacteroidetes (14%), Proteobacteria (10%), Spirochaetes (9%), Fibrobacteres (7%), Tenericutes (5%) y Actinobacteria (2%), los cuales representaron el 70% de los filos identificados en el contenido ruminal.  Conclusión:  El ambiente ruminal de novillos Nelore en pastoreo presenta una alta diversidad de bacterias, con dominancia de los filos Firmicutes, Bacteroidetes, Proteobacteria, Spirochaetes y Fibrobacteres .]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Antecedentes:  Os microrganismos ruminais têm desenvolvido uma serie de complexas interações que representam um dos melhores exemplos de simbiose entre microrganismos na natureza. Os métodos taxonômicos tradicionais baseados em métodos de cultura vêm sendo substituídos por técnicas moleculares que apresentam maior velocidade a acurácia.  Objetivo:  Caracterizar a diversidade bacteriana ruminal em novilhos Nelore mantidos em pastagens tropicais mediante o sequenciamento do gene 16S rRNA utilizando a plataforma de sequenciamento Illumina.  Métodos:  Foram utilizados três novilhos Nelore fistulados no rúmen. A fração liquida e solida do conteúdo ruminal foram processadas para extrair o DNA metagenômico, e as regiões hipervariáveis V1 e V2 do gene 16S rRNA foram sequenciadas na plataforma Illumina.  Resultados:  No total foram geradas 11.407.000 leituras de qualidade adequada, e 812 unidades taxonomicas operacionais (OTUs) foram identificadas no nível de espécie. Foram identificados 27 filos, e houve predominância de Firmicutes (23%), Bacteroidetes (14%), Proteobacteria (10%), Spirochaetes (9%), Fibrobacteres (7%), Tenericutes (5%) e Actinobacteria (2 %), os quais representaram 70% dos filos identificados a partir do rúmen bovino.  Conclusão:  O ambiente ruminal em novilhos Nelore em pastejo apresentou alta diversidade bacteriana, com Firmicutes, Bacteroidetes, Proteobacteria, Spirochaetes e Fibrobacteres como filos predominantes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[bacterial diversity]]></kwd>
<kwd lng="en"><![CDATA[Cynodon spp]]></kwd>
<kwd lng="en"><![CDATA[Firmicutes]]></kwd>
<kwd lng="en"><![CDATA[Nellore]]></kwd>
<kwd lng="en"><![CDATA[new generation sequencing]]></kwd>
<kwd lng="en"><![CDATA[steers]]></kwd>
<kwd lng="en"><![CDATA[ruminant]]></kwd>
<kwd lng="en"><![CDATA[ruminal bacteria]]></kwd>
<kwd lng="en"><![CDATA[rumen microorganisms]]></kwd>
<kwd lng="en"><![CDATA[Zebu]]></kwd>
<kwd lng="es"><![CDATA[bacterias ruminales]]></kwd>
<kwd lng="es"><![CDATA[Cynodon spp]]></kwd>
<kwd lng="es"><![CDATA[diversidad bacteriana]]></kwd>
<kwd lng="es"><![CDATA[Firmicutes]]></kwd>
<kwd lng="es"><![CDATA[Nelore]]></kwd>
<kwd lng="es"><![CDATA[novillos]]></kwd>
<kwd lng="es"><![CDATA[microorganismos ruminales]]></kwd>
<kwd lng="es"><![CDATA[rumiante]]></kwd>
<kwd lng="es"><![CDATA[secuenciación genética]]></kwd>
<kwd lng="es"><![CDATA[secuenciación de última generación]]></kwd>
<kwd lng="es"><![CDATA[Zebú]]></kwd>
<kwd lng="pt"><![CDATA[bacteria ruminal]]></kwd>
<kwd lng="pt"><![CDATA[Cynodon spp]]></kwd>
<kwd lng="pt"><![CDATA[diversidade bacteriana]]></kwd>
<kwd lng="pt"><![CDATA[Firmicutes]]></kwd>
<kwd lng="pt"><![CDATA[Nelore]]></kwd>
<kwd lng="pt"><![CDATA[novilhos]]></kwd>
<kwd lng="pt"><![CDATA[microrganismos ruminais]]></kwd>
<kwd lng="pt"><![CDATA[ruminante]]></kwd>
<kwd lng="pt"><![CDATA[sequenciamento genético]]></kwd>
<kwd lng="pt"><![CDATA[sequenciamento de nova geração]]></kwd>
<kwd lng="pt"><![CDATA[Zebu]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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