Inheritance studies of the foliar blight of wheat caused by Helminthosporium sativum
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Authors
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R.V. SINGH, A.K. SINGH, B.N. SINGH DINESH SINGH and R.K. SINGH
Department of Plant Pathology, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad,
U.P. 224 229
Keywords:
Wheat, foliar blight, resistance, inheritanceAbstract
A total of of 105 wheat genotypes were tested under artificial epiphytotics against H. sativum [Cochliobolus sativus] and Alternaria triticina for 3 crop years (1988-89 to 1990-91) in India. Of these, 16 genotypes (PATO (R) TZPPSN 64 NAR, VEE 'S', SM4-HSN-24, BOW 'S', KVZ-BON, BJY 'S' X TOBCHA, PF 70354-YACO 'S', HD 2206 X HORK 'S', DL 153-2, ISWYT-I, HS 284, NI 8289, BW 1052, CB (BW) 362, BW 11259 and CPAN 1910) were resistant, 21 were moderately resistant, 48 were moderately susceptible, 15 were susceptible and 5 were highly susceptible. No genotype was immune. The crosses NI 8289 X UP 262, CPAN 1910 X UP 262 and NI 8289 X HUW 234 exhibited susceptibility and were comparable with their parents, UP 262 and HUW 234. In F2, segregation in all the 3crosses followed a 1 (resistant):15 (susceptible) ratio suggesting that 2 recessive duplicate genes confer resistance to foliar blight in wheat.
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