Polyphasic approach to the taxonomy of the Rhizopus stolonifer group |
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| Affiliation: | 1. Department of Agroindustry, Food and Nutrition, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Pádua Dias Av., 11, 13418-900 Piracicaba, São Paulo, Brazil;2. São Paulo''s Agency for Agribusiness Technology, SP 127 Highway, km 30, 13400-970 Piracicaba, São Paulo, Brazil;3. Department of Plant Pathology and Nematology, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Pádua Dias Av., 11, 13418-900 Piracicaba, São Paulo, Brazil |
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| Abstract: | ![]()
Phylogenetic analysis of Rhizopus strains based on the D1/D2 region of LSU rDNA sequences yielded a phylogram with four well-supported clades. The R. microsporus clade concurs with classification obtained by traditional methods. The R. oryzae group was found to include species of the genus Amylomyces. The traditional R. stolonifer group was divided into two well-supported clades in the phylogram, with one clade comprising R. stolonifer var. stolonifer, R. sexualis var. sexualis, and R. sexualis var. americanus and the other clade comprising taxa with recurved sporangiophores; R. reflexus, R. stolonifer var. lyococcus, and R. circinans, identifying recurved sporangiophores as an important taxonomic character. The molecular data supported the recognition of this clade at the species level: R. lyococcus (basionym: Sporotrichum lyococcum). |
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