High gene flow and outcrossing within populations of two cryptic fungal pathogens on a native and non-native host in Cameroon.
Fungal Biol
; 116(3): 343-53, 2012 Mar.
Article
en En
| MEDLINE
| ID: mdl-22385617
ABSTRACT
In this study, we determined the genetic diversity of 126 isolates representing both Lasiodiplodia theobromae and Lasiodiplodia pseudotheobromae, collected from Theobroma cacao and Terminalia spp. in Cameroon, using simple sequence repeat (SSR) markers. SSR alleles showed clear genetic distinction between L. theobromae and L. pseudotheobromae, supporting their earlier separation as sister species. Both L. theobromae and L. pseudotheobromae populations from Cameroon had high levels of gene diversity, moderate degrees of genotypic diversity, and high levels of gene flow between isolates from T. cacao and Terminalia spp. There was no evidence for geographic substructure in these populations across the region studied, and the SSR alleles were randomly associated in both species, suggesting outcrossing. The significant levels of aggressiveness, evolutionary potential represented by high levels of diversity, outcrossing and gene flow between geographically and host defined populations, identify these fungi as high-risk pathogens for their native and non-native hosts in Cameroon.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedades de las Plantas
/
Ascomicetos
/
Variación Genética
/
Cacao
/
Terminalia
País/Región como asunto:
Africa
Idioma:
En
Revista:
Fungal Biol
Asunto de la revista:
MICROBIOLOGIA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Sudáfrica