EVIDENCE FOR A DOMINANT GENE FOR RESISTANCE ON LEAVES OF COMMON BEAN TO THE COMMON BACTERIAL BLIGHT PATHOGEN, XANTHOMONAS AXONOPODIS PV. PHASEOLI

摘要

The common bean blight pathogen [Xanthomonas axonopodis pv. phaseoli (Xap)] remains a limiting factor for common (Phaseolus vulgaris L.) bean production worldwide and resistance to the pathogen in most commercial bean varieties is inadequate. Variability of the bacterial pathogen has been observed in strains isolated from Puerto Rico and Central America indicating the presence of pathogenic races (Zapata, 1996, Zapata and Beaver, 2005). In previous research, bean lines were identified that had a differential reaction when inoculated with different Xap strains. In an attempt to identify specific genes for resistance to common bacterial blight in common bean, a breeding line that showed a differential reaction on the foliage to Xap strains was crossed with a susceptible parent.