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Genetic gain on resistance to spot blotch of wheat by developing lines with near immunity

Author: Kumar, U.
Author: Suneel Kumar
Author: Prasad, R.
Author: Roder, M.S.
Author: Kumar, S.
Author: Chand, R.
Author: Vinod Kumar Mishra
Author: Joshi, A.K.
Year: 2019
ISSN: 2632-7309 (Print)
URI: https://hdl.handle.net/10883/20656
Format: PDF
Language: English
Publisher: Hapres State Key Laboratory of Hybrid Rice
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Place of Publication: United Kingdom
Issue: 2
Issue: art. e190017
Volume: 1
DOI: 10.20900/cbgg20190017
Description: Spot blotch (causative pathogen the fungus Bipolaris sorokiniana) is a damaging disease of wheat in warm and humid environments, which are prevalent in the Indian subcontinent. Genetic analyses have indicated that resistance is mediated by a number of independent genes, each contributing a small to intermediate size effect, meaning that combinations of three to five genes are required to ensure a high level of resistance. Near-immunity to spot blotch is not known. Hence, in order to seek further genetic gain on resistance, populations were developed from four simple crosses between the resistance donors “Yangmai#6” and either “Mon/Ald”, “Chirya#3”, “Tia#1” or “Ning#8201” with the aim of stacking resistance genes for resistance in order to generating lines showing near-immunity to the disease. The strategy was evaluated by genotyping the selections at 14 microsatellite loci linked to spot blotch resistance genes. The resistance locus most frequently retained by the selections maps to chromosome 6D; the second most frequently retained one maps to chromosome 2B. The use of a donor × donor crossing strategy was effective for developing lines with near-immunity to spot blotch disease.
Agrovoc: COCHLIOBOLUS SATIVUS
Agrovoc: MICROSATELLITES
Agrovoc: IMMUNITY
Agrovoc: PLANT DISEASES
Agrovoc: WHEAT
Related Datasets: https://cbgg.hapres.com/UpLoad/Supplementary%20Materials/CBGG-00504%20sup%20final.pdf
Journal: Crop Breeding, Genetics and Genomics


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  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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