Confirmation that the Er3 gene, conferring resistance to Erysiphe pisi in pea, is a different gene from er1 and er2 genes

With 1 table Abstract Only two genes conferring resistance to powdery mildew, er1 and er2 , were known in Pisum sativum , till the recent postulation of a new dominant gene in Pisum fulvum , Er3 . However, additional studies were needed to discern whether Er3 was a novel gene or just a new allele at either er1 or er2 . In this study, we demonstrate that Er3 segregates independently from er1 and er2 genes, being therefore a different gene. We also prove that Er3 is present in several P . fulvum accessions.