<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242023000100039</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v14i1.6129</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variabilidad genética en biomasa aérea y sus componentes en alfalfa bajo riego y sequía]]></article-title>
<article-title xml:lang="en"><![CDATA[Genetic variability in aerial biomass and its components in alfalfa under irrigation and drought]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna-Guerrero]]></surname>
<given-names><![CDATA[Milton Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Castañeda]]></surname>
<given-names><![CDATA[Cándido]]></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>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<volume>14</volume>
<numero>1</numero>
<fpage>39</fpage>
<lpage>60</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242023000100039&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242023000100039&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242023000100039&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La sequía disminuye el rendimiento de biomasa aérea (BM) y sus componentes, y la calidad del forraje en alfalfa. Se estudió la variación genética en BM y sus componentes en 10 variedades de alfalfa bajo riego (R) y sequía (S) en invernadero. Se utilizó un diseño experimental de bloques completos al azar, con cuatro repeticiones en R y cuatro en S. La unidad experimental fue una planta individual en un tubo de PVC. La siembra se realizó el 15 de marzo de 2017 y el trasplante en los tubos, 20 días después de la siembra. Se aplicó la dosis de fertilización 60-140-00 a 44, 240 y 420 ddt (días después del trasplante). La S redujo (P&#8804;0.01) la BM, el rendimiento de materia seca de hojas (RMSH), número de tallos (NT) y la eficiencia en el uso de la radiación (EUR). Las plantas en S no recuperaron su capacidad productiva después de experimentar el déficit hídrico, aún después del riego de recuperación. La S también disminuyó (P&#8804;0.01) la varianza fenotípica para la BM y sus componentes; la varianza aditiva fue mayor (P&#8804;0.01) que la varianza de dominancia para todos los caracteres en R y S. La BM, relación H:T, altura de planta (AP), NT y EUR tuvieron mayor (P&#8804;0.01) heredabilidad en R y S. Las variedades Genex, Atlixco, Júpiter y Milenia fueron las más productivas (P&#8804;0.01) en S, y podrían utilizarse para la producción de forraje en áreas con escasez de agua o como líneas parentales, para el mejoramiento del rendimiento de forraje en los programas de selección.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Drought decreases the yield of aerial biomass (BM) and its components, and the quality of forage in alfalfa. The genetic variation in BM and its components was studied in 10 varieties of alfalfa under irrigation (I) and drought (D) in a greenhouse. A randomized complete block experimental design was used, with four repetitions in I and four in D. The experimental unit was an individual plant in a PVC pipe. Sowing was carried out on March 15, 2017, and transplanting in the pipes, 20 days after sowing. The fertilization dose 60-140-00 was applied at 44, 240 and 420 dat (days after transplanting). D reduced (P&#8804;0.01) BM, leaf dry matter yield (LDMY), number of stems (NS) and radiation use efficiency (RUE). The plants in D did not recover their productive capacity after experiencing the water deficit, even after the recovery irrigation. D also decreased (P&#8804;0.01) the phenotypic variance for BM and its components; the additive variance was greater (P&#8804;0.01) than the dominance variance for all traits in I and D. The BM, L:S ratio, plant height (PH), NS and RUE had higher (P&#8804;0.01) heritability in I and D. The Genex, Atlixco, Júpiter and Milenia varieties were the most productive (P&#8804;0.01) in D and could be used for forage production in water-scarce areas or as parental lines for forage yield improvement in selection programs.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Análisis de componentes principales]]></kwd>
<kwd lng="es"><![CDATA[Componentes de varianza]]></kwd>
<kwd lng="es"><![CDATA[Heredabilidad]]></kwd>
<kwd lng="es"><![CDATA[Invernadero]]></kwd>
<kwd lng="en"><![CDATA[Greenhouse]]></kwd>
<kwd lng="en"><![CDATA[Heritability]]></kwd>
<kwd lng="en"><![CDATA[Principal component analysis]]></kwd>
<kwd lng="en"><![CDATA[Variance components]]></kwd>
</kwd-group>
</article-meta>
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