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Open AccessAbstract

Novel Source of Biotic Stress Resistance Identified from Brassica Species and its Wild Relatives

1
ICAR-National Bureau of Plant Genetic Resources, Pusa Campus-110 012, New Delhi, India
2
ICAR-Indian Agricultural Research Institute, Regional Station, Wellington, The Nilgiris, Tamil Nadu-643231, India
3
ICAR-National Research Center on Plant Biotechnology, Pusa Campus-110012, New Delhi, India
4
Bioversity International-India, NASC Complex, Pusa Campus, New Delhi 110012, India
*
Author to whom correspondence should be addressed.
Presented at the Third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, Australia, 11–13 November 2019.
Proceedings 2019, 36(1), 195; https://doi.org/10.3390/proceedings2019036195
Published: 8 April 2020
(This article belongs to the Proceedings of The Third International Tropical Agriculture Conference (TROPAG 2019))
In rapeseed and mustard, the major diseases (downy mildew, white rust, Alternaria blight and Sclerotinia stem rot) cause 37–47%loss in pod formation and 17–54% reduction in grain yield. The identification of new sources of resistance is a high priority in breeding programs. About 3000 germplasm accessions of Indian mustard were evaluated under multiple environments (3 seasons) at hot spots (4 locations) and under artificial epiphytophic conditions against insect pests and diseases (aphids, white rust, powdery mildew and Alternaria blight). Accessions IC265495, IC313380, EC766091, EC766133, EC766134, EC766192, EC766230, EC766272 were identified as highly resistant to white rust (A. candida) with disease severity reaction (Percent disease severity Index, PDI = 0) under artificial inoculation. Accession RDV 29 showed the inheritance of resistant source for powdery mildew in Indian mustard. Screening of brassica wild relatives (about 25 species) for white rust found that Brassica fruticulosa, Brassica tournefortii, Camelina sativa, Diplotaxis assurgens, D. catholica, D. cretacia, D. Erucoides, D. Muralis, Lepidium sativum had highly resistance (PDI = 0) to Delhi isolates of white rust. Several traits identified from cultivated and related species will be useful for genetic improvement of rapeseed and mustard.
Keywords: Indian mustard germplasm; disease resistance; white rust; powdery mildew Indian mustard germplasm; disease resistance; white rust; powdery mildew
MDPI and ACS Style

Yadav, R.; Nanjundan, J.; Gupta, A.K.; Rao, M.; Akhtar, J.; Rana, J.C.; Kumar, A.; Singh, K. Novel Source of Biotic Stress Resistance Identified from Brassica Species and its Wild Relatives. Proceedings 2019, 36, 195.

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