Identification of Novel Sources of Resistance to Ascochyta Blight in a Collection of Wild Accessions.

Phytopathology

Centre for Crop and Disease Management, School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia.

Published: February 2021

Chickpea production is constrained worldwide by the necrotrophic fungal pathogen , the causal agent of Ascochyta blight (AB). To reduce the impact of this disease, novel sources of resistance are required in chickpea cultivars. Here, we screened a new collection of wild accessions for AB resistance and identified accessions resistant to multiple, highly pathogenic isolates. In addition to this, analyses demonstrated that some collection sites of harbor predominantly resistant accessions, knowledge that can inform future collection missions. Furthermore, a genome-wide association study identified regions of the genome associated with AB resistance and investigation of these regions identified candidate resistance genes. Taken together, these results can be utilized to enhance the resistance of chickpea cultivars to this globally yield-limiting disease.

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http://dx.doi.org/10.1094/PHYTO-04-20-0137-RDOI Listing

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