title: Phylogenetic analyses on the diversity of Aspergillus fumigatus sensu lato based on five orthologous loci.
abstract: One hundred isolates of Aspergillus fumigatus sensu lato mainly from China, as well as from Australia, France, India, Indonesia, Ireland, UK, and USA were analyzed to infer their sequence types (STs) and population diversity based on partial calmodulin, calcineurin regulatory subunit B, beta-tubulin, cytochrome C and calcineurin catalytic subunit A genes as well as their mating types, using ClonalFrame, Structure and MEGA software. Our results inferred 48 STs and showed that most of the STs or lineages evolved independently and without clear population structure among them. Whereas one lineage was recognized that could be a true population and in which one clade might diverge into another distinct lineage, namely, a cryptic species, A. neoellipticus. In addition, we found that mutation, parasexual, and sexual recombination could, respectively, play specific roles in the evolution of these fungi. Our results also showed that MAT1-1/MAT1-2 mating type ratios of A. fumigatus sensu lato was biased to nearly 1:1.4 (20/28) when clone-corrected, but when not clone-corrected, the ratio of MAT1-1/MAT1-2 was so biased as near 1:2 (35/65), which might mean that isolates with MAT1-2 are in the process of losing sexual ability preceding those with MAT1-1.
authors.affiliation: Department of Infectious Diseases and Clinical Microbiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Li
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.forename: Long
authors.initials: L
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Cao
mesh_terms: D001232:Aspergillus fumigatus / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D016000:Cluster Analysis; D004271:DNA, Fungal / Q000235:genetics*; D019143:Evolution, Molecular; D005800:Genes, Fungal; D056426:Genetic Loci; D014644:Genetic Variation; D006801:Humans; D008969:Molecular Sequence Data; D009154:Mutation; D010802:Phylogeny; D055732:Pulmonary Aspergillosis / Q000382:microbiology; D011995:Recombination, Genetic; D017422:Sequence Analysis, DNA; D017385:Sequence Homology
chemical_list: D004271:DNA, Fungal
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