Population Genetics of Plant Pathogenic Fungi

Fusarium culmorum is a single phylogenetic species based on multilocus sequence analysis

“…Although the small collection of isolates used in this study cannot be considered a true population (McDonald & McDermott 1993) our data are in agreement with these findings. In our study MAT-1 and MAT-2 mating types were approximately in equal proportions within each of the Australian, European and WANA collection of F. culmorum isolates, which further strengthens the hypothesis that sexual reproduction may be occurring in this species.…”

Characterisation of Phytophthora capsici isolates from black pepper in Vietnam

“…However, sexual reproduction may not be playing a direct role in disease epidemics of black pepper foot rot in Vietnam. One of the conditions which support random sexual reproduction of Phytophthora species is the presence of both compatibility types in an even ratio (Brasier 1992;McDonald & McDermott 1993;Goodwin 1997;Lamour & Hausbeck 2000). In the current study, the ratio of A1:A2 differed greatly from 1:1 ratio.…”

“…The importance of genetic analysis of pathogen populations is well accepted in understanding disease epidemiology, hostpathogen interactions, resistant breeding, and prediction of fungicide resistance (McDonald et al 1989;McDonald & McDermott 1993;Milgroom & Fry 1997;McDonald & Linde 2002;Milgroom & Peever 2003). Many studies on genetic variation of P. capsici populations, which cause crown, root and fruit rot of Capsicum spp.…”

Isozyme polymorphisms within Pyrenophora tritici-repentis population in Argentina

“…This technique has also been assayed to characterize interespecific and intraspecific polymorphisms of fungi (Anné-Peberdy 1981;Boshoff 1996;Bridge et al 1986). The use of isozymes as markers for estimating the amount of variability within a fungal populations is well documented (Mc Donald and Mc Dermott 1993;Micales et al 1998). Using this technique, several workers have presented evidence for the delineation of taxa at a subspecies level.…”

“…Isozyme electrophoretic analysis is a powerful biochemical technique used by mycologist and plant pathologist to asses the genetic variation within and among fungal populations, to trace the geographic origins of pathogens, and to determine ploidy levels in fungi (Brammer 2000;Bonde et al 1993;Castro and Bach 1993;Mc Donald and Mc Dermott 1993;Micales et al 1998Micales et al , 1986Reynolds et al 1983). Isozyme analysis has proved to be a successful tool in studying the evolution of races in other fungal species (Bocchese et al 2003;Burdon and Roelfs 1985;Fry et al 1991;Koch and Kölher 1990).…”