Evaluation of spring wheat germplasms in response to disease resistance against spot blotch disease
DOI:
https://doi.org/10.48165/jefa.2024.19.01.28Keywords:
Wheat, Bipolaris sorokiniana, resistance, disease screening and AUDPCAbstract
Spot blotch disease, caused by the fungus Bipolaris sorokiniana, is one of the most important foliar blight limiting wheat production in the world’s warmer regions. The field experiment was conducted to determine the response to spot blotch in spring wheat. WAMI- Wheat Association Mapping Initiative panel comprised 289 elite spring wheat lines, and one resistant (Yangmai 6) and one susceptible (Sonalika) varieties were evaluated against artificial epiphytotic condition at two spot blotch hot spot locations in India during 2018-2020 cropping seasons. It was noted that the mean area under the disease progress curve (AUDPC) value resulted in 7 resistant, 37 moderately resistant, 227 moderately susceptible, and 18 susceptible genotypes were observed during the 2018-2020 in BHU location whereas, 6 resistant, 24 moderately resistant, 222 moderately susceptible and 37 susceptible genotypes were observed during the 2018-2020 in BISA location. However, 4 genotypes exhibited spot blotch resistance reactions that were stable at both locations, 8 genotypes showed a moderately resistant reaction, 178 moderately susceptible and 6 susceptible. The genotypes which showed consistent spot blotch resistance in two locations are being used as spot blotch resistance sources for future spot blotch disease-resistant breeding programs.
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