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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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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.2019.8(10): 1828-1834
DOI: https://doi.org/10.20546/ijcmas.2019.810.212


Screening of Mustard Lines against Alternaria Blight and Optimization of Screening Time under Cool Humid Conditions of Bihar
Abhishek Kumar1*, Chanda Kushwaha1, Chandan Kishore2,Subhashish Sarkhel1 and Ravi Shankar Singh2
1Department of Plant Pathology, Bihar Agricultural University, Sabour,Bhagalpur-813210, India
2Department of Plant Breeding and Genetics, Bihar Agricultural University,Sabour, Bhagalpur-813210, India
*Corresponding author
Abstract:

Considerable losses caused by Alternaria blight on the oilseed crop rapeseed-mustard annually caused by Alternaria brassicae and Alternaria brassicicola. The study was conducted with the aim to assess tolerant sources of mustard lines against dark spot and to ascertain the optimum time of screening against the disease in Bihar region. We screened 50 lines of mustard against Alternaria blight under natural incidence in the year 2015-16 and 2016-17 using Area Under Disease Progress Curve (AUDPC). Visual estimation of disease severity was taken into consideration which was rated as no spot (0 %) on the leaves to more than 50 % spots on the leaves and the same was corresponded with the scale given by AICRP, 2011 ranging from 0 to 9. Germplasms showed moderate tolerance to high susceptibility. Based upon average AUDPC values for two years, 4 genotypes namely IC-399840, IC-312496, IC-342778 and IC-399802 showed lowest AUDPC values between 300-500 showing tolerance and 4 genotypes namely IC-426392, Varuna, IC-264131 and IC-491566were found to be highly susceptible with AUDPC values of 900-1100 to Alternaria blight. Disease response was recorded at three different time intervals in order to find out optimum time of screening of mustard lines against Alternaria blight. Results suggested that at around 76 DAS would be the optimum time for assessment of mustard lines against Alternaria blight. At this time period (76 DAS) the disease distribution among the germplasm lines screened were found to be normally distributed. The tolerant sources will be useful for selecting elite genotypes for managing Alternaria blight where mustard cultivation is prevalent as well as in breeding for improved genotypes against Alternaria blight.


Keywords: Alternaria, AUDPC, Brassica, Genotype
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How to cite this article:

Abhishek Kumar, Chanda Kushwaha, Chandan Kishore, Subhashish Sarkhel and Ravi Shankar Singh. 2019. Screening of Mustard Lines against Alternaria Blight and Optimization of Screening Time under Cool Humid Conditions of BiharInt.J.Curr.Microbiol.App.Sci. 8(10): 1828-1834. doi: https://doi.org/10.20546/ijcmas.2019.810.212