<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952016000100089</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variación del factor de forma y el ahusamiento en procedencias de cedro rojo (Cedrela odorata L.)]]></article-title>
<article-title xml:lang="en"><![CDATA[Variation of form factor and taper in provenances of spanish cedar (Cedrela odorata L.)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tlaxcala-Méndez]]></surname>
<given-names><![CDATA[Rolando M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos-Posadas]]></surname>
<given-names><![CDATA[Héctor M. de los]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-de la Rosa]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Ayala]]></surname>
<given-names><![CDATA[José L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico Superior de Zongolica  ]]></institution>
<addr-line><![CDATA[Zongolica Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2016</year>
</pub-date>
<volume>50</volume>
<numero>1</numero>
<fpage>89</fpage>
<lpage>105</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952016000100089&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952016000100089&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952016000100089&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El conocimiento de la geometría en los fustes de los árboles es relevante en los estudios de progenies para obtener germoplasma, debido a que los individuos mejores deben tener crecimiento adecuado y también las características mejores en la conformación del fuste. Para ello, es necesario evaluar la forma de los fustes mediante métodos analíticos. El objetivo de esta investigación fue identificar la progenie con el rendimiento mayor de aserrío considerando la forma, el ahusamiento y el volumen comercial de siete procedencias de Cedrela odorata L. establecidas en Tezonapa, Veracruz, México. Para esto, se realizaron muestreo destructivo de 211 árboles. Dos modelos de regresión lineal y no lineal se ajustaron y complementaron con pruebas de adicionalidad en los parámetros de forma y ahusamiento. Los resultados mostraron que los parámetros de forma de las progenies de Tuxtepec, Tierra Blanca y Tezonapa adoptaron forma de paraboloide, y las de María Lombardo, San Andrés Tuxtla, Costa del Golfo y Comala tendieron a la conicidad. Todas las progenies fueron estadísticamente diferentes en parámetros de ahusamiento, lo cual se atribuyó a la interacción genotipo-ambiente y a la invasión del barrenador Hypsipyla grandella Zeller. Además, los parámetros de forma se evaluaron en tres sistemas compatibles de ahusamiento y volumen, mediante el ajuste con estimación SUR (Seemingly Unrelated Regressions). La fuente geográfica de Tuxtepec presentó conicidad menor por su fustes geométricamente más cercanos al paraboloide (factor de forma, ff 0.45), por lo cual podría ser la línea principal para acopio de germoplasma y producción local.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Knowledge of tree stem geometry is relevant for progeny studies aiming to obtain germplasm since the best individuals should have adequate growth and the best characteristics of stem formation. Thus, it is necessary to evaluate stem form with analytical methods. The objective of this study was to identify the progeny with the highest milling yield, considering form factor, taper variation and commercial volume of seven provenances of Cedrela odorata L. established in Tezonapa, Veracruz, Mexico. To this end, destructive sampling of 211 trees was carried out. Two linear regression and two non-linear regression models were fit and complemented with tests of additionality in the parameters form and taper. The results showed that the form parameters of the progenies from Tuxtepec, Tierra Blanca and Tezonapa adopted a paraboloid shape, and those from María Lombardo, San Andrés Tuxtla, Costa del Golfo and Comala tended to be conical. All the progenies were statistically different in taper parameters, which is attributed to the interaction genotype-environment and to infestation by the borer Hypsipyla grandella Zeller. Moreover, form parameters were evaluated in three compatible form and taper systems fitted with SUR (Seemingly Unrelated Regressions) estimation. The geographical source of Tuxtepec was less conical because the stems were geometrically closer to a paraboloid (form factor, ff0.45). Therefore, Tuxtepec could be the main line of germplasm collection for local production.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cedrela odorata L.]]></kwd>
<kwd lng="es"><![CDATA[Hypsipyla grandella Zeller]]></kwd>
<kwd lng="es"><![CDATA[características fenotípicas]]></kwd>
<kwd lng="es"><![CDATA[variable indicadora]]></kwd>
<kwd lng="en"><![CDATA[Cedrela odorata L.]]></kwd>
<kwd lng="en"><![CDATA[Hypsipyla grandella Zeller]]></kwd>
<kwd lng="en"><![CDATA[phenotypical characteristics]]></kwd>
<kwd lng="en"><![CDATA[indicator variable]]></kwd>
</kwd-group>
</article-meta>
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