title: Speciation in Pyricularia inferred from multilocus phylogenetic analysis.
abstract: Pyricularia isolates from various host plants were subjected to a multilocus phylogenetic analysis based on rDNA-ITS, actin, beta-tubulin, and calmodulin loci. A combined gene tree resolved seven groups with 100% BS support, suggesting that they are monophyletic groups supported concordantly by all four loci. By incorporating biological and morphological species criteria, each of the seven groups was considered to be a current species. However, phylogenetic relationships among these species were unresolved in the single-gene trees and in the combined tree. Furthermore, the transition from concordance to conflict occurred more than once in the combined gene tree. They were interpreted by assuming that Pyricularia has evolved through repeated species radiation. The transition point other than the current species limit was considered to be the limit of the former species.
authors.affiliation: Graduate School of Agriculture, Kobe University, Nada, Kobe 657-8501, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Hirata
authors.forename: Motoaki
authors.initials: M
authors.lastname: Kusaba
authors.forename: Izumi
authors.initials: I
authors.lastname: Chuma
authors.forename: Jun
authors.initials: J
authors.lastname: Osue
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Nakayashiki
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Mayama
authors.forename: Yukio
authors.initials: Y
authors.lastname: Tosa
mesh_terms: D000199:Actins / Q000235:genetics; D001203:Ascomycota / Q000145:classification* / Q000235:genetics; D002147:Calmodulin / Q000235:genetics; D004271:DNA, Fungal / Q000032:analysis; D021903:DNA, Ribosomal Spacer / Q000032:analysis* / Q000235:genetics; D005656:Fungal Proteins / Q000235:genetics*; D049810:Genetic Speciation; D008969:Molecular Sequence Data; D016533:Mycological Typing Techniques; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D013045:Species Specificity; D014404:Tubulin / Q000235:genetics
chemical_list: D000199:Actins; D002147:Calmodulin; D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer; D005656:Fungal Proteins; D014404:Tubulin