Potential of microsatellites to distinguish four races of Fusarium oxysporum f. sp. ciceri prevalent in India

Barve, M P and Haware, M P and Sainani, M N and Ranjekar, P K and Gupta, V S (2001) Potential of microsatellites to distinguish four races of Fusarium oxysporum f. sp. ciceri prevalent in India. Theoretical and Applied Genetics, 102 (1). pp. 138-147. ISSN 1432-2242

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Fusarium oxysporum f. sp. ciceri, the causal agent of chickpea wilt, is an important fungal pathogen in India. Thirteen oligonucleotide probes complementary to microsatellite loci, in combination with 11 restriction enzymes, were used to assess the potential of such markers to study genetic variability in four Indian races of the pathogen. Hybridisation patterns, which were dependent upon both the restriction enzyme and oligonucleotide probe used, revealed the presence of different repeat motifs in the F. oxysporum f. sp. ciceri genome. Among the restriction enzymes used, hexa-cutting enzymes were more informative than tetra- and penta-cutting enzymes, whereas tetranucleotide and trinucleotide repeats yielded better hybridisation patterns than dinucleotide repeats. Dependent upon the levels of polymorphism detected, we have identified (AGT)5, (ATC)5 and (GATA)4 as the best fingerprinting probes for the F. oxysporum f. sp. ciceri races. The distribution of microsatellite repeats in the genome revealed races 1 and 4 to be closely related at a similarity index value of 76.6%, as compared to race 2 at a similarity value of 67.3%; race 3 was very distinct at a similarity value of 26.7%. Our study demonstrates the potential of oligonucleotide probes for fingerprinting and studying variability in the F. oxysporum f. sp. ciceri races and represents a step towards the identification of potential race diagnostic markers.

Item Type: Article
Divisions: RP-Grain Legumes
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Fusarium oxysporum; DNA fingerprinting; chickpea
Subjects: Mandate crops > Chickpea
Depositing User: Mr Ramesh K
Date Deposited: 22 Jun 2015 06:21
Last Modified: 06 Aug 2015 09:59
URI: http://oar.icrisat.org/id/eprint/8804
Official URL: http://dx.doi.org/10.1007/s001220051629
Acknowledgement: UNSPECIFIED
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