National Academy of Agricultural Sciences (NAAS)
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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 2018: 95.39 NAAS RATING 2020: 5.38 |
The present investigation on population structure of Sclerotinia sclerotiorum (Lib.) de Bary casual organism of White mold disease of common bean (Phaseolus vulgaris L.) was carried by collecting diseased samples and sclerotia from different north Kashmir regions. A total of eighty pathogenic isolates of Sclerotinia sclerotiorum were maintained from four districts of North-Kashmir viz. Baramulla (36 isolates, B01-B36), Bandipora (08 isolates, N01-N08), Ganderbal (17 isolates, G01-G17) and Kupwara (19 isolates, K01-K19). These were subjected to mycelial compatibility testing and based on these tests a total of 22 Mycelial compatibility groups (MCGs) were formed. MCG-1 was the largest with 11 isolates followed by MCG-2 with 8 isolates and then by MCGs 3 and 4 each with 6 number of isolates. MCGs 5, 6, 7 and 8 consisted five isolates each while MCGs 9, 10, and 11 comprised three isolates each. MCGs 12, 13 were having three and 14, 15 two isolates each. MCGs 16, 17, 18, 19, 20, 21 and 22 were comprised of a single isolate each. Mostly, the isolates collected from adjacent localities were compatible. However, some MCGs also comprised distantly separated isolates. Therefore, the population of S. sclerotiorum is composed of many genotypes and while some MCGs are present in a particular area, many are distributed over larger areas.
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