International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 1
First page : (840) Last page : (848)
Article doi: http://dx.doi.org/10.18782/2320-7051.5534

Pathogenic and Molecular Variability of Aspergillus niger Isolates Causing Collar Rot Disease in Groundnut

V. Divya Rani^1*, Hari Sudini², P. Narayan Reddy³, U. Naga Mangala⁴ and
K. Vijay Krishna Kumar^5
1Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana, India
²International Crops Research Institute for the Semi-Arid Tropics, Patancheru, India
³Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana, India
⁴International Crops Research Institute for the Semi-Arid Tropics, Patancheru, India
⁵Acharya N G Ranga Agricultural University, Andhra Pradesh, India
*Corresponding Author E-mail: divyavallapu@gmai.com
Received: 26.08.2017  |  Revised: 30.09.2017   |  Accepted: 7.10.2017  

 ABSTRACT

Pathogenic variability studies of 26 isolates of collar rot pathogen (Aspergillus niger) of groundnut collected from different districts of Telangana and Andhra Pradesh states were conducted under greenhouse conditions by using two groundnut cultivars TMV-2 and JL-24. The mean seedling mortality ranged from 29.7 per cent (MBNRAn-1 (Palkapally)) to 94.4 per cent (ATPAn-1 (Jogannapet)). All the isolates of A. niger showed differential reaction with regard to seedling mortality on JL-24 and TMV-2 cultivars. Similarly genetic relatedness among eight virulent isolates (two isolates from each district) of A. niger from groundnut was assessed by using RAPD analysis. The similarity index values among the A. niger isolates varied from 0.571 (between WGL An-2 and CHT An-3) to 0.229 (between MBNR An-3 and WGL An-2).

Key words: Groundnut, Collar rot, Aspergillus niger, Pathogenic variability, Molecular variability

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Divya Rani, V., Sudini, H., Reddy, P.N., Mangala, U.N. and Kumar, K.V.K., Pathogenic and Molecular Variability of Aspergillus niger Isolates Causing Collar Rot Disease in Groundnut, Int. J. Pure App. Biosci.6(1): 840-848 (2018). doi: http://dx.doi.org/10.18782/2320-7051.5534