Morphological, pathogenic and genetic variability amongst sorghum isolates of Colletotrichum graminicola from India

Latha, J and Mathur, K and Mukherjee, P K and Chakrabarti, A and Rao, V P and Thakur, R P (2002) Morphological, pathogenic and genetic variability amongst sorghum isolates of Colletotrichum graminicola from India. Indian Phytopathology, 55 (1). pp. 19-25. ISSN 0367-973X

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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.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Colletotrichum graminicola, sorghum, pathogenic variability, virulence, RAPD
Subjects:	Mandate crops > Sorghum
Depositing User:	Library ICRISAT
Date Deposited:	13 Dec 2011 11:35
Last Modified:	13 Dec 2011 11:35
URI:	http://oar.icrisat.org/id/eprint/4936
Official URL:
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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