Phylogenetic relationship of the SdhB gene among Sclerotinia sclerotiorum and other plant pathogens based on amino acid sequence. The identities between the S. sclerotiorum SdhB amino acid sequence and that of other plant pathogens are as follows: Botrytis cinerea, 94% identity; Podosphaera xanthii (AB547417), 90% identity; Didymella bryoniae (HQ156462.1), 80% identity; Mycosphaerella graminicola (Mg, AAB97419.1), 77% identity; Pleurotus ostreatus (AB007363.1), 75% identity; Alternaria alternata (B2BZ64), 74% identity; Saccharomyces cerevisiae (Sc, B3LTD3), 73% identity; Corynespora cassiicola (AB548738), 73% identity; Aspergillus oryzae (Ao, Q2TWM0), 71% identity; Xanthomonas campestris SdhB (WP_017113179.1), 69% identity; Ustilago maydis SdhB (GenBank: CAA44612.1), 65% identity.