Abstract

WILLIAMS-ALANIS, Héctor et al. Evaluation of sorghum [Sorghum bicolor (L.) Moench.] hybrids for resistance to charcoal rot [Macrophomina phaseolina (Tassi) Goid.] in Tamaulipas, Mexico. Rev. mex. fitopatol [online]. 2009, vol.27, n.1, pp.69-72. ISSN 2007-8080.

Charcoal rot caused by Macrophomina phaseolina (MP) is the most important disease that limits sorghum dryland production in northern Tamaulipas, Mexico. Grain yield losses caused by MP are approximately 30%. The objective of this study was to evaluate the response of experimental and commercial hybrids to MP and identify MP tolerant progenitors. Experimental hybrids RB-118 x 435 and RB-27 x 437 showed MP tolerance and grain field similar to commercial checks Pioneer 82G63, Pioneer 84G62, RB-Patrón, Asgrow Z-400, RB-3030, and DK-47, and greater than Asgrow-Ámbar. Progenitor females that produced tolerant MP hybrids were LRB-118 and R-27, and males Tx-435 and Tx-437.

Keywords : Artificial inoculation; hybrid selection; grain yield; charcoal rot; tolerance.

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