Rao, V P and Thakur, R P and Mathur, K (1998) Morphological and pathogenic diversity among grain sorghum isolates of Colletotrichum graminicola in India. Indian Phytopathology, 51 (2). pp. 164-174.
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Abstract
Thirty-three isolates of C. graminicola, collected during 1990-94 from 8 states of India were evaluated for morphological and pathogenic diversity. Colony morphology and growth rate of single-spore cultures of the isolates were compared by growing them on oat-meal agar plates and incubating at 25 deg C for 10 days. The isolates showed considerable variation in colony morphology and significant (P< 0.05) variations in growth rate. Pathogenic diversity of the isolates was evaluated by spray-inoculating (1 X 10 sup(5) conidia/ml) onto 6 differential sorghum lines in a greenhouse (25 +- 2 deg and RH >90%). The isolates significantly (P<0.001) varied in pathogenicity (latent period, virulence and aggressiveness). Virulence index, calculated as (virulence X aggressiveness) X latent period sup(-1) was derived to compare the pathogenic potential of the isolates. Hierarchical clustering of the isolates based on mean virulence index grouped the 33 isolates into 6 distinct clusters. Implication of these results in further virulence analysis and anthracnose management through host plant resistance is discussed.
| Item Type: | Article |
|---|---|
| Divisions: | UNSPECIFIED |
| CRP: | UNSPECIFIED |
| Subjects: | Mandate crops > Sorghum |
| Depositing User: | Library ICRISAT |
| Date Deposited: | 17 Sep 2011 08:29 |
| Last Modified: | 17 Sep 2011 08:29 |
| URI: | http://oar.icrisat.org/id/eprint/1724 |
| Official URL: | |
| Projects: | UNSPECIFIED |
| Funders: | UNSPECIFIED |
| Acknowledgement: | UNSPECIFIED |
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