%0 Journal Article
%@ 0367-973X
%A Latha, J
%A Mathur, K
%A Mukherjee, P K
%A Chakrabarti, A
%A Rao, V P
%A Thakur, R P
%D 2002
%F icrisat:4936
%I Indian Phytopathological Society
%J Indian Phytopathology
%K Colletotrichum graminicola, sorghum, pathogenic variability, virulence, RAPD
%N 1
%P 19-25
%T Morphological, pathogenic and genetic variability amongst  sorghum isolates of Colletotrichum graminicola from India
%U http://oar.icrisat.org/4936/
%V 55
%X 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.