Work

Morphological and Pathogenic Diversity Among Grain Sorghum Isolates of Colletotrichum Graminicola in India

Year: 1998

Type: article

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.

Source: Open Access Repository of ICRISAT (International Crops Research Institute for the Semi-Arid Tropics)

Authors: V. P. Rao, R. P. Thakur, Kusum Mathur

Institutions: International Crops Research Institute for the Semi-Arid Tropics, International Crops Research Institute for the Semi-Arid Tropics, International Crops Research Institute for the Semi-Arid Tropics

Language: English

Topic: Plant Pathogens and Fungal Diseases

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: green

OpenAlex ID: W2145286621

FWCI: 0.503

Cites: 7

Cited by: 7

Related to: 10