@article{icrisat4936, title = {Morphological, pathogenic and genetic variability amongst sorghum isolates of Colletotrichum graminicola from India}, publisher = {Indian Phytopathological Society}, author = {J Latha and K Mathur and P K Mukherjee and A Chakrabarti and V P Rao and R P Thakur}, pages = {19--25}, year = {2002}, volume = {55}, journal = {Indian Phytopathology}, number = {1}, keywords = {Colletotrichum graminicola, sorghum, pathogenic variability, virulence, RAPD}, url = {http://oar.icrisat.org/4936/}, abstract = {A total of 18 isolates of Collectotrichum graminicola infecting sorghum in Andhra Pradesh and Maharashtra, India, were characterised and compared for morphological, pathogenic and genetic diversity. The representative single-lesion isolates and their derivatives varied significantly for morphological traits -colony colour, growth pattern and sporulation on oat meal agar medium. These isolates also exhibited significant variation for disease reaction on a set of sorghum differential lines in greenhouse tests. The isolates from the local sorghum cultivars were although different from those of CSH 9, they did infect CSH 9 indicating a virulence shift in the C. graminicola population from the local sorghum to hybrid CSH 9. Genotypic variation was studied using the random amplified polymorphic DNA (RAPD) technique. A set of six random primers could differentiate the isolates. The cluster analysis indicated a very high genetic variability among isolates of C. graminicola and amogg variants from a single lesion isolates in RAPD profile.} }