Divergence of the IGS rDNA in Fusarium proliferatum and Fusarium globosum reveals two strain specific non-orthologous types

Jurado García-Posada, Miguel and Marín, Patricia and Vázquez, Covadonga and González Jaén, María Teresa (2012). Divergence of the IGS rDNA in Fusarium proliferatum and Fusarium globosum reveals two strain specific non-orthologous types. "Mycological Progress", v. 11 ; pp. 101-107. ISSN 1617-416X.

Description

Title: Divergence of the IGS rDNA in Fusarium proliferatum and Fusarium globosum reveals two strain specific non-orthologous types
Author/s:
  • Jurado García-Posada, Miguel
  • Marín, Patricia
  • Vázquez, Covadonga
  • González Jaén, María Teresa
Item Type: Article
Título de Revista/Publicación: Mycological Progress
Date: 2012
ISSN: 1617-416X
Volume: 11
Subjects:
Faculty: E.U.I.T. Agrícolas (UPM)
Department: Ciencia y Tecnología Aplicadas a la Ingeniería Técnica Agrícola [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A phylogenic analysis of Fusarium proliferatum and closely related species was performed using the most variable part within the intergenic spacer of the nuclear ribosomal DNA (IGS) and compared with a previously reported phylogeny performed in the same group of samples with a partial region of the nuclear single copy gene encoding the elongation factor 1α (EF-1α). The phylogenies from both genomic sequences were not concordant and revealed the presence of two nonorthologous IGS types, named types I and II, in F. proliferatum and Fusarium globosum. Two specific PCR assays designed to amplify either IGS type I or type II revealed that only one IGS type was present in each individual in these two species. The presence of both IGS types at the species level indicates that homogenization has not been achieved yet. This might be retarded if panmictic sexual reproduction was affected by certain levels of clonal reproduction and/or by the diverse hosts that these species are able to colonize. This study indicates that taxonomic studies carried out with the IGS rDNA, which has been widely used in Fusarium, should be undertaken with caution.

More information

Item ID: 15830
DC Identifier: http://oa.upm.es/15830/
OAI Identifier: oai:oa.upm.es:15830
Deposited by: Memoria Investigacion
Deposited on: 16 Jul 2013 12:01
Last Modified: 21 Apr 2016 16:08
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