Follow
International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2019) [Effective from January 1, 2019]For more details click here

Login as a Reviewer

Indexed in



National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

See Guidelines to Authors
Current Issues

Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(8): 3203-3215
DOI: https://doi.org/10.20546/ijcmas.2017.608.382


Variation in Alternaria brassicae Population Causing Alternaria Blight of Rapeseed and Mustard in Assam
Diganggana Talukdar1*, A. R. Baruah2, P. Debnath3 and Utpal Dey4
1Department of Plant Pathology and Microbiology, College of Horticulture,CAU, Ranipool, Gangtok-737135, Sikkim, India
2Department of Plant Biotechnology, 3Department of Plant Pathology, Assam Agricultural University, Jorhat-785013, Assam, India
4Division of Crop Production, ICAR for NEH, Umiam-793103, Meghalaya, India
*Corresponding author
Abstract:

Forty isolates of Alternaria brassicae extracted from the leaves and pods of rapeseeds and mustard collected from all the agro-climatic zones of Assam were studied for variability. The average conidial length and breadth of the isolates varied from 34.99µm to 46.36µm and 5.16µm to 9.72µm; and beak length from 4.01µmto 18.00µm. Numbers of horizontal septa and longitudinal septa ranged from 4.95 to 8.56 and 0.00 to 0.48, respectively. Four distinct colony colours - whitish gray; dark and brownish gray; gray, and greenish were identified. The isolates were compressed, slightly compressed, fluffy and slightly fluffy. Shapes of the colonies were either circular or irregular. The growth pattern was slow (0-40mm), medium (41-60mm) and fast (61-90mm). Molecular characterization revealed highest similarity (0.435) between Dhemajiand Darang isolates. Maximum dissimilarity (0.00) was observed between Jorhat isolate and Dhubri isolate, and between Sivsagar and Dhubri. The dendrogrambased on similarity index generated four clusters with 7, 15, 11and 7 isolates.


Keywords: Variability, Alternaria blight, Molecular characterization, Rapeseed and mustard.
Download this article as Download

How to cite this article:

Diganggana Talukdar, A.R. Baruah, P. Debnath and Utpal Dey. 2017. Variation in Alternaria brassicae Population Causing Alternaria Blight of Rapeseed and Mustard in Assam.Int.J.Curr.Microbiol.App.Sci. 6(8): 3203-3215. doi: https://doi.org/10.20546/ijcmas.2017.608.382