Abstract
A new species of Ulocladium was discovered from diseased leaves of Lycopersicon esculentum and Duchesnea indica from Hunan Province of China. Morphologically, this species is very close to U. consortiale, U. cucurbitae, and U. subcucurbitae in producing narrow ellipsoid conidia at 1–3 days, but the conidial size range of this species at this stage could distinguish it from three well-known species. It also exhibits the multiplex conidium morphology at the different growth-stages (1–3 days and 4–7 days). The results of maximum parsimony (MP) and neighbor-joining (NJ) phylogenetic analyses of combined glyceraldehyde-3-phosphate dehydrogenase (gpd) gene and Alternaria alternata major allergen (Alt a 1) genes show that U. solani and U. subcucurbitae cluster in a unique and separate subclade with no clear affinities to a specific sistergroup, and demonstrate that the Ulocladium species group is monphyletic, but two clades of this section are recognized. Morphological features of this new species, the sequences of the Alt a 1 and gpd gene regions, and its comparison with related species in this genus are discussed.
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