<?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>0187-7380</journal-id>
<journal-title><![CDATA[Revista fitotecnia mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. fitotec. mex]]></abbrev-journal-title>
<issn>0187-7380</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitogenética A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73802016000300285</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Propagación  in vitro de selecciones de guayabo (Psidium guajava L.)]]></article-title>
<article-title xml:lang="en"><![CDATA[ In vitro propagation of guava selections (Psidium guajava L.)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Perales]]></surname>
<given-names><![CDATA[L. Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Álvarez]]></surname>
<given-names><![CDATA[José L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Izquierdo]]></surname>
<given-names><![CDATA[Serafín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santacruz-Varela]]></surname>
<given-names><![CDATA[Amalio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrientos-Priego]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Padilla-Ramírez]]></surname>
<given-names><![CDATA[J. Saúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Espinosa]]></surname>
<given-names><![CDATA[Ma. Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Posgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[Chapingo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Pabellón de Arteaga Aguascalientes]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>39</volume>
<numero>3</numero>
<fpage>285</fpage>
<lpage>295</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802016000300285&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802016000300285&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802016000300285&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La propagación in vitro mediante organogénesis directa de brotes de guayabo (Psidium guajava L.) constituye una alternativa para la rápida obtención de plantas productivas. El presente trabajo tuvo como objetivo optimizar un protocolo de regeneración in vitro a partir de ápices y segmentos nodales de cinco genotipos de guayabo con alto potencial comercial Paluma 12 (PM12), Paluma 6 (PM6), 17-06, Roja Exterior Redonda (RER) y Roja Chapeada Grande (CHRG). Se evaluó la adición de polivinilpirrolidona (PVPP) en el medio de cultivo como agente antioxidante. Los genotipos RER y CHRG presentaron menor número de brotes, con 10 y 0 % de fenolización. En la fase de multiplicación de propágulos los mejores resultados fueron obtenidos cuando los brotes se desarrollaron en el medio Murashige y Skoog (MS) con el suplemento de 0.5 mg L-1 de BAP y con 30 mg L-1 de adenina para los genotipos PM6 y PM12, mientras que el genotipo 17-06 tuvo mejor desarrollo con la adición de 15 mg L-1 de sulfato de adenina. La adición de 40 mg L-1 de sulfato de adenina representó el mejor tratamiento para los genotipos RER y CHRG. El enraizamiento se indujo satisfactoriamente mediante la incubación de los brotes durante 24 h en medio MS suplementado con 2.54 mg L-1 de AIA para el genotipo 17-06, con 1.34 mg L-1 de AIB para los genotipos PM6 y RER, y con 2.94 de AIB para los genotipos CHRG y PM12.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In vitro propagation of guava (Psidium guajava L.) shoots by direct organogenesis is an alternative to quickly obtain productive plants. This work optimized a protocol for in vitro regeneration from apexes and nodal segments of five different guava genotypes with high commercial potential Paluma 12 (PM12), Paluma 6 (PM6), 17-06, Roja Exterior Redonda (RER) and Roja Chapeada Grande (CHRG). The effect of polyvinylpyrrolidone (PPVP) was evaluated as an antioxidant. Genotypes RER and CHRG showed low phenolization problems of 10 y 0 %, respectively. In the multiplication phase, genotypes PM6 and PM12 showed the best results when their shoots were grown on Murashige y Skoog medium (MS) supplemented with 0.5 mg L-1 BAP and 30 mg L-1 adenine; meanwhile var. 17-06 developed better by addition of 15 mg L-1 of adenine sulfate. Addition of 40 mg L-1 of adenine sulfate resulted in the best treatment for vars. RER and CHRG. Rooting was induced by 24 h of shoot incubation on MS medium supplemented with 2.54 mg L-1 IAA for var. 17-06, while IBA at 1.34 mg L-1 induced rooting in cvs. PM6 and RER; IBA concentration had to be increased to 2.94 mg L-1 for better rooting in var. CHRG and PM12.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Psidium guajava]]></kwd>
<kwd lng="es"><![CDATA[organogénesis directa]]></kwd>
<kwd lng="es"><![CDATA[optimización de protocolo]]></kwd>
<kwd lng="es"><![CDATA[genotipos]]></kwd>
<kwd lng="en"><![CDATA[Psidium guajava]]></kwd>
<kwd lng="en"><![CDATA[direct organogenesis]]></kwd>
<kwd lng="en"><![CDATA[protocol optimization]]></kwd>
<kwd lng="en"><![CDATA[genotypes]]></kwd>
</kwd-group>
</article-meta>
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