Caracterización morfológica de biotipos de Phalaris minor resistentes y susceptible a herbicidas inhibidores de la ACCasa

José Luis Garcia-Franco, Ebandro Uscanga-Mortera, Josué Kohashi-Shibata, Antonio García-Esteva, Petra Yáñez-Jiménez, Héctor Manuel Ortega-Escobar
2014 Botan‪ical Sciences  
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200%; font-family: 'Times New Roman','serif'; mso-ansi-language: ES-TRAD; mso-fareast-language: ES;" lang="ES-TRAD">Phalaris minor</span><span style="font-size: 12.0pt; line-height: 200%; font-family: 'Times New Roman','serif'; mso-ansi-language: ES-TRAD; mso-fareast-language: ES;" lang="ES-TRAD"> Retz. ("alpistillo") es considerada como una maleza importante en el cultivo de trigo en la región del Bajío Mexicano, que ha desarrollado resistencia a herbicidas inhibidores de la Acetil Coenzima A Carboxilasa (ACCasa). En algunos casos se ha observado que las malezas se mimetizan con el cultivo. El objetivo del presente trabajo fue determinar sí biotipos resistentes y susceptibles de alpistillo se mimetizan con el trigo y si entre biotipos hay diferencia. Se realizaron experimentos en Montecillo, estado de México en condición de no competencia en invernadero. Los biotipos resistentes empleados fueron: C4, C7, Gto. y Jal. y uno susceptible. Los cultivares de trigo empleados fueron: Cortazar y Nana. Se registraron 20 variables morfológicas en la fase vegetativa para la comparación del trigo con los biotipos de alpistillo y 23 en todo el ciclo biológico para la comparación entre los biotipos. Los datos se analizaron mediante análisis discriminante, el cual mostró una separación estadística entre los biotipos de alpistillo y los cultivares de trigo, por lo que es factible diferenciarlos visualmente en estado de plántula. El análisis discriminante también exhibió que existen diferencias morfológicas entre los biotipos resistentes de alpistillo, lo cual sugiere que la resistencia se desarrolló en forma independiente en los biotipos y que no fue una población resistente inicial de la cual ocurriera la dispersión; ya que si tuvieran su origen en una sola población resistente, se esperaría que los biotipos fueran similares morfológicamente debido a su cercanía genética. </span></p><p> </p>
doi:10.17129/botsci.44 fatcat:u76rv47ehjd5bnwxvcz6sj3che