Artículo
Origin, divergence, and phylogeny of epichloë endophytes of native Argentine grasses
Fecha de publicación:
12/2005
Editorial:
Academic Press Inc Elsevier Science
Revista:
Molecular Phylogenetics and Evolution
ISSN:
1055-7903
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The epichloë endophytes are systemic, constitutive, and often vertically transmitted fungal symbionts of grass species in subfamily Poöideae. Prior studies indicate that several asexual epichloë endophytes (Neotyphodium species) have evolved directly from sexual (Epichloë) species, whereas others evolved by hybridization between two or more endophyte species. In this paper, we investigate the phylogenies of 27 Neotyphodium spp. isolates from 10 native grass species (in 4 tribes) in 22 populations throughout Argentina. Relationships among these fungi and a worldwide collection of epichloë endophytes were estimated by phylogenetic analysis of sequences from variable portions (mainly introns) of genes for β-tubulin (tub2) and translation elongation factor 1-α (tef1). Most of the Argentine endophyte isolates were interspecific hybrids of Epichloë festucae and E. typhina. Only one isolate was a hybrid of a different ancestry, and three isolates were apparently non-hybrid endophytes. These results indicate that interspecific hybridization, which promotes genetic variation, was common during the evolution of the endophytes of Argentine grasses.
Palabras clave:
Epichloë
,
Endophyte Phylogeny
,
Poaceae
,
Neotyphodium
,
Hybrid Fungi
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Articulos(INMIBO (EX - PROPLAME))
Articulos de INSTITUTO DE MICOLOGIA Y BOTANICA
Articulos de INSTITUTO DE MICOLOGIA Y BOTANICA
Citación
Gentile, Agustina; Rossi, Maria Susana; Cabral, Daniel; Craven, Kelly D.; Schardl, Christopher L.; Origin, divergence, and phylogeny of epichloë endophytes of native Argentine grasses; Academic Press Inc Elsevier Science; Molecular Phylogenetics and Evolution; 35; 1; 12-2005; 196-208
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