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Pathogenic Variability of Isolates of Pseudocercospora griseola, the Cause of Common Bean Angular Leaf Spot, and its Implications for Resistance Breeding
Author(s) -
E Silva Kaesel Jackson Damasceno,
De Souza Elaine Aparecida,
Sartorato Aloisio,
De Souza Freire Cassius ato
Publication year - 2008
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.2008.01413.x
Subject(s) - biology , cultivar , leaf spot , inoculation , veterinary medicine , fungus , botany , horticulture , medicine
The pathogenic variability was evaluated of 48 Pseudocercospora griseola isolates collected in the State of Minas Gerais, Brazil. Isolates were inoculated to a set of 12 international differential cultivars in a greenhouse. Ten pathotypes (55‐15, 63‐7, 63‐15, 63‐23, 63‐25, 63‐27, 63‐31, 63‐47, 63‐55 and 63‐63) were identified, showing the great pathogenic variability of this fungus in Minas Gerais State. Pathotypes 55‐15, 63‐15, 63‐25 and 63‐27 had not previously been reported in the State. Of the 48 isolates, all except pathotype 55‐1547 induced a compatible reaction with all cultivars from the Andean group. Isolates were highly pathogenic in both Andean and Mesoamerican cultivars, thus being classified as Mesoamerican pathotypes. Pathotype 63‐63 was the most widespread, and overcame the resistance genes present in all differential cultivars.