ORIGINAL ARTICLE
Exploration of molecular variability in Rhizoctonia bataticola, the incitant of root rot disease of pulse crops
1
Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore-641
003
Corresponding author
Subramanian Sundravadana
Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore-641 003
Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore-641 003
Journal of Plant Protection Research 2011;51(2):184-189
KEYWORDS
TOPICS
ABSTRACT
The present study explored pathogenic and genetic variability among the eleven isolates of
Rhizoctonia bataticola
(Taub.)
Butler from different pulse crops. Based on morphological characters, 11 isolates were categorized into three groups
viz.,
linear, fluffy,
and linear at the end with fluffy growth at the center. Isolates also showed variability in sclerotial characters (intensity and shape) and
intensity of pigment synthesis. All isolates were more aggressive on the original host from which it was isolated, which was shown
by the variability in pathogenic characters. RAPD-PCR analysis has shown that genetic clustering agreed with the above findings in
dendrogram analysis (2 clusters A and B). The black gram root isolates showed a maximum genetic similarity of 73 % with soya bean
shoot isolate. Red gram shoot isolate showed 61% genetic similarity with green gram isolates. The findings from this study confirm
the variability in
R. bataticola
isolates from pulses, according to their pathological as well as genetic characters. In the future, variability
in pathogens will determine effective management practices
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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| eISSN: | 1899-007X |
| ISSN: | 1427-4345 |
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