Identification of group I introns within the SSU rDNA gene in species of Ceratocystiopsis and related taxa.
Fungal Biol
; 116(1): 98-111, 2012 Jan.
Article
em En
| MEDLINE
| ID: mdl-22208605
ABSTRACT
During a recent phylogenetic study, group I introns were noted that interrupt the nuclear small subunit ribosomal RNA (SSU rDNA) gene in species of Ceratocystiopsis. Group I introns were found to be inserted at the following rDNA positions S943, S989, and S1199. The introns have been characterized and phylogenetic analysis of the host gene and the corresponding intron data suggest that for S943 vertical transfer and frequent loss appear to be the most parsimonious explanation for the distribution of nuclear SSU rDNA introns among species of Ceratocystiopsis. The SSU rDNA data do suggest that a recent proposal of segregating the genus Ophiostoma sensu lato into Ophiostoma sensu stricto, Grosmannia, and Ceratocystiopsis has some merit but may need further amendments, as the SSU rDNA suggests that Ophiostoma s. str. may now represent a paraphyletic grouping.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
DNA Fúngico
/
DNA Ribossômico
/
RNA Ribossômico 18S
/
Íntrons
/
Ophiostomatales
Tipo de estudo:
Diagnostic_studies
/
Incidence_studies
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article