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Characterization of Colletotrichum graminicola populations from a sorghum hybrid CSH 9 for morphological and pathogenic variability

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Relation http://oar.icrisat.org/4933/
 
Title Characterization of Colletotrichum graminicola populations from a sorghum hybrid CSH 9 for morphological and pathogenic variability
 
Creator Mathur, K
Thakur, R P
Rao, V P
 
Subject Sorghum
 
Description 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.
 
Publisher Indian Phytopathological Society
 
Date 2001
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier 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