<?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>1900-9607</journal-id>
<journal-title><![CDATA[CES Medicina Veterinaria y Zootecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Ces. Med. Vet. Zootec.]]></abbrev-journal-title>
<issn>1900-9607</issn>
<publisher>
<publisher-name><![CDATA[Universidad CES]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1900-96072017000200088</article-id>
<article-id pub-id-type="doi">10.21615/cesmvz.12.2.2</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variabilidad genética en seis SNPs de los genes CAPN1, CAST y LEP de toros brahman en ganaderías del trópico bajo colombiano]]></article-title>
<article-title xml:lang="en"><![CDATA[Genetic variability in six SNPs of CAPN1, CAST and LEP genes of brahman bulls in cattle farms on colombian tropical lowlands]]></article-title>
<article-title xml:lang="pt"><![CDATA[Variabilidade genética em seis SNPs dos genes CAPN1, CAST e LEP de touros brahman em baixo trópico colombiano]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Rojas]]></surname>
<given-names><![CDATA[Luis Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Patiño-Cadavid]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Herrera]]></surname>
<given-names><![CDATA[Albeiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Echeverri Zuluaga]]></surname>
<given-names><![CDATA[José Julián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad CES  ]]></institution>
<addr-line><![CDATA[Sabaneta ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad CES  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<volume>12</volume>
<numero>2</numero>
<fpage>88</fpage>
<lpage>102</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1900-96072017000200088&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1900-96072017000200088&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1900-96072017000200088&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los genes CAPN1 y CAST codifican la (-calpaína y la calpastatina, las cuales participan en la degradación de las fibras musculares luego del rigor mortis, además, el gen LEP codifica a la leptina, una hormona que regula la deposición de grasa en el músculo. Éstos genes presentan SNPs relacionados con la terneza y la jugosidad de la carne y con características de la canal. Con el fin de conocer el potencial genético de la raza Brahman, se genotipificaron los SNPs CAPN316, CAPN4751, CAST282, CAST2959, E2FB y E2JW mediante PCR-HRM en 270 machos de ganaderías de cuatro regiones y se hizo un estudio de estructura y diferenciación poblacional. No hubo diferencia (p&gt;0,05) en las frecuencias alélicas y genotípicas de los marcadores evaluados entre las subpoblaciones, las frecuencias genotípicas en la población general fueron: CAPN316 (CG = 0,078, GG = 0,922), CAPN4751 (CC = 0,289, CT = 0,104, TT = 0,606), CAST282 (CC = 0,285, CG = 0,448, GG = 0,267), CAST2959 (AA = 0,400, AG = 0,370, GG = 0,230), E2FB (CC = 0,633, CT = 0,356, TT = 0,011) y E2JW (AA = 0,985, AT = 0,010, TT = 0,004). Los marcadores CAPN316, CAST282 y E2JW se encontraron en HWE (p&gt;0,05), mientras que CAPN4751 y CAST2959 presentaron Ho &lt; He y en E2FB Ho &gt; He. Los valores de los estadísticos F fueron: FIS = 0,153, FIT = 0,157 y FST= 0,005. De lo anterior se deduce que las ganaderías Brahman estudiadas presentan un leve grado de endogamia y constituyen una sola población, todos los marcadores evaluados son polimórficos, excepto E2JW, sin embargo existe la posibilidad de producir carne más tierna y jugosa debido a que aunque con frecuencias muy bajas, se pueden encontrar animales portadores de todos los alelos asociados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The CAPN1 and CAST genes encodes &#956;-calpain and calpastatin, both genes participate on degradation of muscle fibers after rigor mortis; in addition the LEP gene codes for leptin, which regulates the fat deposition in muscle. These genes shows SNPs related to tenderness and juiciness of meat and productive characteristics of the carcass. In order to know the genetic potential of Brahman cattle the CAPN316, CAPN4751, CAST282, CAST2959, E2FB and E2JW SNPs were genotyped by PCR-HRM in 270 Brahman males from four different geographical areas, also the study of differentiation of population structure was made. There was no difference (p&gt; 0.05) in genotype and allele frequencies of these markers between subpopulations, the genotypic frequencies in the general population were: CAPN316 (CG = 0.078, GG = 0.922), CAPN4751 (CC = 0.289, CT = 0.104, TT = 0.606), CAST282 (CC = 0.285, CG = 0.448, GG = 0.267), CAST2959 (AA = 0.400, AG = 0.370, GG = 0.230), E2FB (CC = 0.633, CT = 0.356, TT = 0.011) and E2JW (AA = 0.985, AT = 0.010, TT = 0.004). The CAPN316, CAST282 and E2JW markers were found in HWE (p&gt; 0.05), while CAPN4751 and CAST2959 showed Ho &lt; He and in E2FB Ho &gt; He. The F statistics values were: &#8203;&#8203;FIS = 0.153, FIT = 0.157 and FST = 0.005. Was conclude that the Brahman herds studied present a slight degree of inbreeding and constitute a single population; all markers evaluated are polymorphic, except for E2JW, however the production of more tender and juicy meats could be possible, because the associated alleles with this characteristics were founds although in low frequencies.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Os genes CAPN1 e CAST codificam (-calpaína e calpastatina, que participam da degradação das fibras musculares após o rigor mortis, além disso, o gene LEP codifica a leptina, um hormônio que regula a deposição de gordura no músculo. Estes genes apresentam SNPs relacionados à ternura e suco de carne e com características do canal. Para conhecer o potencial genético da raça Brahman, os SNPs CAPN316, CAPN4751, CAST282, CAST2959, E2FB e E2JW foram genotipados por PCR-HRM em 270 homens de quatro regiões e um estudo sobre a estrutura e diferenciação da população. Não houve diferenças (p&gt;0,05) nas freqüências alélicas e genotípicas dos marcadores avaliados entre as subpopulações, as freqüências genotípicas na população geral foram: CAPN316 (CG = 0,078, GG = 0,922), CAPN4751 (CC= 0,289, CT= 0,104, TT = 0,606), CAST282 (CC = 0,285, CG = 0,448, GG= 0,267), CAST2959 (AA = 0,400, AG= 0,370, GG = 0,230), E2FB (CC = 0,633, CT= 0,356, TT= 0,011) e E2JW (AA= 0,985, AT = 0,010, TT = 0,004). Os marcadores CAPN316, CAST282 e E2JW foram encontrados em HWE (p&gt;0,05), enquanto CAPN4751 e CAST2959 mostraram Ho &lt;He e em E2FB Ho&gt; He. Os valores das estatísticas F foram: FIS = 0,153, FIT = 0,1557 e FST = 0,005. A partir do acima, deduz-se que os rebanhos de Brahman estudaram apresentar um ligeiro grau de endogamia e constituem uma população única, todos os marcadores avaliados são polimórficos, exceto E2JW, porém existe a possibilidade de produzir carne mais suave e suculenta porque, embora com freqüências muito baixo, podem ser encontrados animais que transportam todos os alelos associados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[CAPN316]]></kwd>
<kwd lng="en"><![CDATA[CAPN4751]]></kwd>
<kwd lng="en"><![CDATA[CAST282]]></kwd>
<kwd lng="en"><![CDATA[CAST2959]]></kwd>
<kwd lng="en"><![CDATA[juicy]]></kwd>
<kwd lng="en"><![CDATA[LEPE2FB]]></kwd>
<kwd lng="en"><![CDATA[LEPE2JW]]></kwd>
<kwd lng="en"><![CDATA[tenderness]]></kwd>
<kwd lng="es"><![CDATA[CAPN316]]></kwd>
<kwd lng="es"><![CDATA[CAPN4751]]></kwd>
<kwd lng="es"><![CDATA[CAST282]]></kwd>
<kwd lng="es"><![CDATA[CAST2959]]></kwd>
<kwd lng="es"><![CDATA[jugosidad]]></kwd>
<kwd lng="es"><![CDATA[LEPE2FB]]></kwd>
<kwd lng="es"><![CDATA[LEPE2JW]]></kwd>
<kwd lng="es"><![CDATA[Terneza]]></kwd>
<kwd lng="pt"><![CDATA[CAPN316]]></kwd>
<kwd lng="pt"><![CDATA[CAPN4751]]></kwd>
<kwd lng="pt"><![CDATA[CAST282]]></kwd>
<kwd lng="pt"><![CDATA[CAST2959]]></kwd>
<kwd lng="pt"><![CDATA[EPE2FB]]></kwd>
<kwd lng="pt"><![CDATA[LEPE2JW]]></kwd>
<kwd lng="pt"><![CDATA[suculento]]></kwd>
<kwd lng="pt"><![CDATA[ternura]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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