Sources of resistance to Exserohilum turcicum (Pass.) and Puccinia polysora (Underw.) incitant of Turcicum leaf blight and polysora rust of maize |
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| Authors: | Sangit Kumar K T Pardurange Gowda S K Pant Bupesh Kumar Bineet Kaur |
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| Institution: | 1. Directorate of Maize Research , Pusa Campus IARI , New Delhi , 110 012 , India;2. University of Agricultural Sciences A.R.S. Nagenahalli , Mysore , India;3. V.P.K.A.S. Almora (Uttarakhand) , India |
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| Abstract: | A study was carried out to identify the sources of resistance to Turcicum leaf blight (TLB) and polysora rust in maize. Sixty indigenous and exotic inbred lines were evaluated under artificial epiphytotic conditions at two identified hot spot locations, Almora and Nagenahalli. After two years continuous screening, a total of 20 inbred lines were identified as a sources of resistance at both the locations for TLB, whereas 10 inbred lines were identified resistant against Polysora rust at Nagenahalli. A clear cut variation in virulence pattern in case of E. turcicum was observed. Some of the inbred inbred lines, i.e CM 138, CM 212, IML 235, NAI 135, showed resistant reaction in both the locations in the year 2005, whereas they acted as susceptible in 2006 at both locations. It was also observed that the Nagenahalli isolate of E. turcicum was more virulent than the Almora isolate. |
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| Keywords: | maize Exserohilum turcicum Puccinia polysora screening resistance |
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