<?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>2346-3775</journal-id>
<journal-title><![CDATA[Tropical Grasslands-Forrajes Tropicales]]></journal-title>
<abbrev-journal-title><![CDATA[Trop. Grassl.-Forrajes Trop.]]></abbrev-journal-title>
<issn>2346-3775</issn>
<publisher>
<publisher-name><![CDATA[Centro Internacional de Agricultura Tropical (CIAT)]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2346-37752019000200074</article-id>
<article-id pub-id-type="doi">10.17138/tgft(7)74-79</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Sterile leucaena becomes a reality?]]></article-title>
<article-title xml:lang="es"><![CDATA[¿Leucaena estéril será una realidad?]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MCMILLAN]]></surname>
<given-names><![CDATA[HAYLEY E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[LIU]]></surname>
<given-names><![CDATA[GUOQUAN]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SHELTON]]></surname>
<given-names><![CDATA[H. MAX]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[DALZELL]]></surname>
<given-names><![CDATA[SCOTT A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[GODWIN]]></surname>
<given-names><![CDATA[IAN D]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[GAMAGE]]></surname>
<given-names><![CDATA[HARSHI]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SHARMAN]]></surname>
<given-names><![CDATA[CLEO]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[LAMBRIDES]]></surname>
<given-names><![CDATA[CHRISTOPHER J]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,The University of Queensland  ]]></institution>
<addr-line><![CDATA[Brisbane ]]></addr-line>
<country>Australia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Mt St Michael&#8217;s College  ]]></institution>
<addr-line><![CDATA[Ashgrove ]]></addr-line>
<country>Australia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2019</year>
</pub-date>
<volume>7</volume>
<numero>2</numero>
<fpage>74</fpage>
<lpage>79</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2346-37752019000200074&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2346-37752019000200074&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2346-37752019000200074&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A research program to develop sterile leucaena has commenced to enhance red-meat production in additional regions of Australia including Western Australia, Northern Territory and New South Wales, where growing seeded leucaena is not currently permitted or encouraged. In this study we report on the development of methodology using a mutagenizing agent, EMS (ethyl methanesulfonate), to cause mutations in the self-fertile commercial leucaena cultivar, Redlands. Several experiments to determine the optimum rate of EMS have been completed and first generation mutagenized plants (M0) established in the field at Redlands Research Station, Cleveland, Queensland, Australia. An EMS concentration of 0.35% applied to germination paper proved the best method to achieve a target emergence percentage of 50%. To date, 27 of 179 mutagenized M0 seedless plants are considered to be putatively sterile. A further 1,200 M0 plants have been established in the field providing an even greater chance of identifying sterile leucaena plants with the desired forage quality and psyllid-resistance attributes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Un programa de investigación para desarrollar variedades de leucaena estériles fue iniciado para beneficiar la producción de carne roja en diferentes regiones de Australia, incluyendo Western Australia, Northern Territory y New South Wales, donde actualmente no se permite o fomenta el cultivo de leucaena por su potencial riesgo como maleza. En este estudio informamos sobre el desarrollo de una metodología utilizando un agente mutagenizante, EMS (metanosulfonato de etilo), para generar mutaciones en un cultivar comercial de leucaena autofértil, cv. Redlands. Se completaron varios experimentos para determinar la tasa óptima de EMS y se establecieron plantas mutagenizadas de primera generación (M0) en el campo de experimentación Redlands, Cleveland, Queensland, Australia. Se encontró que una concentración de EMS del 0.35% aplicado al papel de germinación es el mejor método para lograr un porcentaje de emergencia del 50%. Hasta la fecha, 27 de 179 plantas M0 mutagenizadas sin semillas se consideran supuestamente estériles. Se han establecido otras 1,200 plantas M0 en el campo, lo que brinda una posibilidad aún mayor de identificar plantas de leucaena estériles al tiempo que se retienen los atributos deseados como alta calidad forrajera y resistencia a los psílidos (insectos de la familia Psyllidae).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ethyl methanesulfonate]]></kwd>
<kwd lng="en"><![CDATA[mutagenesis]]></kwd>
<kwd lng="en"><![CDATA[seedless]]></kwd>
<kwd lng="en"><![CDATA[shy seeding]]></kwd>
<kwd lng="es"><![CDATA[Metanosulfonato de etilo]]></kwd>
<kwd lng="es"><![CDATA[mutagénesis]]></kwd>
<kwd lng="es"><![CDATA[plantas sin semillas]]></kwd>
<kwd lng="es"><![CDATA[semillación escasa]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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