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Book of Abstracts First Legume Society Conference 2013: A Legume Odyssey Novi Sad, Serbia, 9-11 May 2013 _________________________________________________________________________________________ Identification of resistant sources for dry root rot in chickpea (Cicer arietinum L.) KP Viswanatha 1 , Sidramappa Talekar 2 , Poonam Singh 2 , HB Dinesh 2 1 University of Agricultural Sciences, Raichur, Karnataka, India 2 University of Agricultural Sciences, GKVK, Bangalore, Karnataka, India Chickpea is one of the most important pulse crops of India which contains high quality easily digestible protein (25 per cent), making it an important source of protein for the vegetarians of the country. Being the larger producer and consumer, India is still importing Chickpea as the productivity is far below its potentiality. Many biotic and abiotic stresses are limiting the productivity of Chickpea. Dry root rot caused by Rhizoctonia bataticola is emerging as a serious disease and causing 30-40 per cent yield loss among various diseases caused by more than 100 pathogens which attack Chickpea. Although found in all Chickpea growing areas of India, it is most severe in Central and South India, where the crop is grown under rain fed conditions. High day temperature (30°C) and dry soil conditions at flowering and podding stage rapidly increase the severity of the disease. The reaction of 520 Chickpea genotypes was evaluated under laboratory condition using Blotter Paper Technique with artificial inoculation of the disease to identify the resistant source for the disease. Among 520 genotypes, three were found to be resistant viz., PG 06102, BG 2094 and IC 552137. Twenty one genotypes showed moderate resistance reaction and rest were susceptible for dry root rot in Chickpea. The identified resistant genotypes may serve as potential donors for the development of resistant varieties for dry root rot in Chickpea. 221
Book of Abstracts First Legume Society Conference 2013: A Legume Odyssey Novi Sad, Serbia, 9-11 May 2013 _________________________________________________________________________________________ Identification of resistance sources for mosaic virus disease in cowpea [Vigna unguiculata (L.) Walp] KP Viswanatha 1 , DS Ambika 2 , Poonam Singh 2 , HB Dinesh 2 , HC Lohithaswa 2 1 University of Agricultural Sciences, Raichur, Karnataka, India 2 University of Agricultural Sciences, GKVK, Bangalore, Karnataka, India Cowpea [Vigna unguiculata (L.) Walp] is one of the most important, multi season and multipurpose grain legume grown in the tropics and subtropics. This leguminous food crop is greatly affected by wide array of diseases of biological origin especially viruses which cause devastating effects and become real constraints to increase the yield of cowpea in several countries. The use of resistance gene provides an effective and economic solution for viral diseases. Thus, identification of resistance source for the disease is very important for development of resistant high yielding varieties. In the present investigation, 196 genotypes of cowpea were screened in the field condition at Zonal Agriculture Research Station, University of Agricultural Science, Bangalore to identify the resistant source for cowpea mosaic virus. The disease incidence of mosaic virus was scored after 4-5 weeks of sowing at weekly intervals. Twenty three genotypes showed highly resistance reaction. 45, 30, 20, 35 and 78 genotypes showed resistant, moderately resistant, moderately susceptible, susceptible and highly susceptible reaction respectively. Further 196 genotypes were screened in glass house condition by sap inoculation of cowpea mosaic virus. Only two genotypes viz., V 578-17 and HC 03 02 were highly resistant. 9, 12, 5, 12 and 156 genotypes showed resistant, moderately resistant, moderately susceptible, susceptible and highly susceptible reaction respectively. The identified resistant genotypes can be used as potential donors for the development of resistant varieties for Mosaic Virus disease in Cowpea. 222
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First Legume Society Conference 201
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Scientific Committee Michael Abbert
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Programme 9 Session 1 Achievements
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