Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/66071
Type: Artigo de periódico
Title: Evidence for the dispersal of a unique lineage from Asia to America and Africa in the sugarcane fungal pathogen Ustilago scitaminea
Author: Raboin, LM
Selvi, A
Oliveira, KM
Paulet, F
Calatayud, C
Zapater, MF
Brottier, P
Luzaran, R
Garsmeur, O
Carlier, J
D'Hont, A
Abstract: The basidiomycete Ustilago scitaminea Sydow, which causes sugarcane smut disease, has been spreading throughout Africa and America since the 1940s. The genetic diversity and structure of different populations of this fungus worldwide was investigated using microsatellites. A total of 142 single-teliospore were isolated from 77 distinct whips (sori) collected in 15 countries worldwide. Mycelium culture derived from on generation of setting of these single teliospores were analysed for their polymorphisms at 17 microsatellite loci. All these strains but one were homozygous at all loci, indicating that selfing is likely the predominant reproductive mode of U. scitaminea. The genetic diversity of either American or African U. scitaminea populations was found to be extremely low and all strains belong to a single lineage. This lineage was also found in some populations of Asia, where most U. scitaminea genetic diversity was detected, suggesting that this fungal species originated from this region. The strong founder effect observed in U. scitaminea African and American populations suggests that the fungus migrated from Asia to other continents on rare occasions through movement of infected plant material. (c) 2006 Elsevier Inc. All rights reserved.
Subject: sugarcane
smut
Ustilago scitaminea
population genetic structure
selfing
outcrossing
fungus dispersal
microsatellites
Country: EUA
Editor: Academic Press Inc Elsevier Science
Rights: fechado
Identifier DOI: 10.1016/j.fgb.2006.07.004
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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