Diversidad genética de Metarhizium anisopliae en cañaverales de Tabasco y su virulencia sobre Aeneolamia postica
Resumen en inglés: "Metarhizium anisopliae (Metschnikoff.) Sorokin (Moniliales: Moniliaceae) is an entomopathogenic fungus used as a biological control agent against the sugarcane froghopper Aeneolamia postica (Wlk.) (Hemiptera: Cercopidae), one of the main pests of sugarcane in Tabasco, Mexico. Since 2005, multiple isolates of M. anisopliae have been applied by farmers in crop areas; however, the current genetic diversity of the fungus population in the field is unknown. The aim of this study was to characterise isolates of M. anisopliae collected in sugarcane fields to better understand their genetic and virulence characteristics against Aeneolamia postica. In particular, the impact of introduced isolates on the genetic diversity of native strains was determined. Sampling of mycosed insects was conducted in soils from the main sugarcane fields of Tabasco. Twenty isolates of M. anisopliae were obtained and a monosporic culture from each one was used for the characterisation studies. The isolates were characterised using both morphological characteristics and rDNA analysis. The genetic diversity of the fungus was analysed by means of RAPD molecular markers. One of the isolates was significantly similar to the isolate introduced by farmers. RAPD analysis revealed a homogeneous group among the native isolates collected in sugarcane fields in Tabasco. These results suggest a very low incidence of recombination between native and introduced isolates. The implications of the findings on the genetic diversity of M. anisopliae and the use of this pathogen for biological control products for Aeneolamia postica are discussed in this paper. "
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | info:eu-repo/semantics/doctoralThesis biblioteca |
| Language: | spa |
| Subjects: | info:eu-repo/classification/Tesauro/Metarhizium anisopliae;Variación genética;Caña de azúcar;Aeneolamia postica;Control biológico de plagas, info:eu-repo/classification/Tesauro/Metarhizium anisopliae;Genetic variation;Sugarcane;Aeneolamia postica;Pest control Biological, info:eu-repo/classification/cti/2, info:eu-repo/classification/cti/24, |
| Online Access: | http://ecosur.repositorioinstitucional.mx/jspui/handle/1017/1967 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Resumen en inglés: "Metarhizium anisopliae (Metschnikoff.) Sorokin (Moniliales: Moniliaceae) is an entomopathogenic fungus used as a biological control agent against the sugarcane froghopper Aeneolamia postica (Wlk.) (Hemiptera: Cercopidae), one of the main pests of sugarcane in Tabasco, Mexico. Since 2005, multiple isolates of M. anisopliae have been applied by farmers in crop areas; however, the current genetic diversity of the fungus population in the field is unknown. The aim of this study was to characterise isolates of M. anisopliae collected in sugarcane fields to better understand their genetic and virulence characteristics against Aeneolamia postica. In particular, the impact of introduced isolates on the genetic diversity of native strains was determined. Sampling of mycosed insects was conducted in soils from the main sugarcane fields of Tabasco. Twenty isolates of M. anisopliae were obtained and a monosporic culture from each one was used for the characterisation studies. The isolates were characterised using both morphological characteristics and rDNA analysis. The genetic diversity of the fungus was analysed by means of RAPD molecular markers. One of the isolates was significantly similar to the isolate introduced by farmers. RAPD analysis revealed a homogeneous group among the native isolates collected in sugarcane fields in Tabasco. These results suggest a very low incidence of recombination between native and introduced isolates. The implications of the findings on the genetic diversity of M. anisopliae and the use of this pathogen for biological control products for Aeneolamia postica are discussed in this paper. " |
|---|