Race-specific host-plant resistance against black rot (Xanthomonas campestris pv. campestris) in alien Brassicas

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Published

2023-05-16

Keywords:

Cauliflower, screening, Brassica species, black rot, resistance
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Issue

Vol. 78 No. 4 (2021): Indian Journal of Horticulture

Section

Research Articles

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This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Authors

  • Brij Bihari Sharma Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi-110012, Delhi, India.
  • Pritam Kalia Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi-110012, Delhi, India.
  • Shrawan Singh Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi-110012, Delhi, India.
  • Bhopal Singh Tomar Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi-110012, Delhi, India.
  • Dinesh Singh Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi-110012

Abstract

Black rot disease (Xanthomonas campestris pv. campestris (Pam.) Dowson, Xcc) is one of the most devastating diseases in cauliflower worldwide. Potential reservoirs for black rot resistance in alien Brassicas (A and B genomes) were taken due to the availability of limited resistant germplasm for black rot disease in Brassica oleracea (C genome). Total 26 accessions of Brassica species were screened against Xcc race 1, 4, and 6 during three consecutive years, viz., 2015, 2016, and 2017 under artificial inoculation conditions. One accession of B. carinata, and B. napus, two accessions of B. juncea, and all accessions of B. nigra were highly resistant against Xcc race 1, 4, and 6 except SRB-98 (moderate resistance). On the other hand, cauliflower varieties/lines viz., Pusa Meghna, DC 41-5 and Pusa Sharad were highly susceptible against Xcc races 1, 4, and 6. Based on higher homoeology between the A and C sub-genome, a new resistant source BN-2-1 of B. napus was identified, which will be helpful to develop black rot resistant genetic stock with cauliflower through pre-breeding techniques such as in vitro embryo rescue and or somatic hybridization.

How to Cite

Brij Bihari Sharma, Pritam Kalia, Shrawan Singh, Bhopal Singh Tomar, & Dinesh Singh. (2023). Race-specific host-plant resistance against black rot (Xanthomonas campestris pv. campestris) in alien Brassicas. Indian Journal of Horticulture, 78(4), 357–364. Retrieved from https://www.journal.iahs.org.in/index.php/ijh/article/view/707

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