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Rhynchosporium seclais changes its trophic lifestyle . J. Plant Pathol. 97 : 1 – 6 . Arabi , M.I.E. , Jawhar , M. 2004 . Identification of Cochliobolus sativus (spot blotch

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, A. K. (2009): Improved in vitro technique for screening of barley ( Hordeum vulgare L.) genotypes against toxin produced by spot blotch pathogen Bipolaris sorokiniana . Indian J. of Agricultural Sciences 79, 562

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One thousand four hundred and eighty three spring wheat germplasm (Triticum aestivum L.) lines comprising Indian as well as exotic lines were screened for resistance to spot blotch disease during winter 2014-15 at hot spot locations i.e., Banaras Hindu University, Varanasi and Uttar Banga Krishi Vishwavidyalaya, Cooch Behar. Severity of the disease at different stages beginning from tillering to dough stage was recorded. Location Severity Index (LSI) of Varanasi was higher than Cooch Behar. Twenty eight accessions were resistant or highly resistant at both locations. These 28 accessions were validated during the winter season (2015–2016). These germplasm were also evaluated at four environments for agronomic traits. Out of 28 accessions, seven (IC564121, IC529684, IC443669, IC443652, IC529962, IC548325 and EC178071-331) were highly resistant across the locations and over the years of study. These accessions comprised one exotic and six indigenous accessions belonging to Uttarakhand and Haryana. Two lines (IC529962 and IC443652) had higher yield than the best check at all the locations. These lines showing highly resistant reaction alongwith wider adaptability can be expedited for direct cultivation or for the development of high yielding and disease resistant cultivars. These lines can also be used for identification of novel resistance gene using allele mining tools and their deployment for the development of spot blotch resistant cultivars.

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Alam, K.B., Shaheed, M.A., Ahmed, A.U., Malaker, P.K. 1994. Bipolaris leaf blight (spot blotch) of wheat in Bangladesh. In: Saunders, D.A., Hettel, G.P. (eds), Wheat in Heat-Stressed Environments: Irrigated, Dry Areas and

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., Sharma, R. C., Shrestha, S. M. (2005): Epidemiology of foliar blights (spot blotch and tan spot) of wheat in the plains bordering the Himalayas. Phytopathology , 95 , 248–256. Shrestha S. M

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Aggarwal, R., Das, S., Jahani, M., Singh, D.V. 2008. Histopathology of spot blotch [ Bipolaris sorokiniana (teleomorph: Cochliobolus sativus)] infection in wheat. Acta Phytopathol. Entomol. Hung. 43 :23–30. Singh

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References Ahmed , F. , Hossain , I. , Aminuzzaman , F.M. 2003 . Effect of different pathotypes of Bipolaris sorokiniana on spot blotch severity and yield

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. (1998): Breeding for resistance to spotblotch in wheat: Global prospective. In: E. Duveiller, H. J. Dubin, J. Reeves, and A. McNab (eds): Helminthosporium Blights of Wheat: Spot Blotch and Tan Spot. International Maize and Wheat Improvement Centre

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. Pathotypes of Cochliobolus sativus (spot blotch) on barley in Syria. Journal of Plant Pathology 85 :193–196. Jawhar M. Pathotypes of Cochliobolus sativus (spot blotch) on barley

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of Cochliobolus sativus (spot blotch) isolates expressing differential virulence on barley genotypes in Syria . J. Phytopathol. 152 : 461 – 464 . Arabi , M.I.E. , Jawhar , M

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