http://oar.icrisat.org/id/eprint/4933 2011-12-13T12:42:17Z info:eu-repo/semantics/descriptiveMetadata http://oar.icrisat.org/4933/ Characterization of Colletotrichum graminicola populations from a sorghum hybrid CSH 9 for morphological and pathogenic variability Mathur, K Thakur, R P Rao, V P Sorghum During a field survey in the 1994 rainy season a popular commercial sorghum hybrid CSH 9 was found showing anthracnose (Colletotrichum graminicola) symptoms in several farmers' fields in Maharashtra state of India. About 100 single-lesion isolates obtained from representative leaf samples from four fields of CSH 9 and one field of a local sorghum cultivar (LSC) were characterized and compared for morphological and pathogenic variability. The representative single-lesion isolates and their derivatives varied significantly for morphological traits - colony color, growth pattern, spore size and sporulation rate on oatmeal agar medium. These isolates also exhibited significant variation for latent period, virulence, aggressiveness, and virulence index on a set of sorghum differential lines in a greenhouse test. The isolate from the LSC, although differed morphologically from those of CSH 9, did infect CSH 9 and its parental lines, indicating a virulence shift in the C. graminicola population from the local sorghum to hybrid CSH 9. Indian Phytopathological Society 2001 Article PeerReviewed application/pdf en http://oar.icrisat.org/4933/1/Sg.Character%20of%20Cg.2001.KM%2CRPT%2CVPR.I%20Phyt299-303.pdf Mathur, K and Thakur, R P and Rao, V P (2001) Characterization of Colletotrichum graminicola populations from a sorghum hybrid CSH 9 for morphological and pathogenic variability. Indian Phytopathology, 54 (3). pp. 299-303. ISSN 0367-973X info:eu-repo/semantics/objectFile info:eu-repo/semantics/humanStartPage