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Wheat stripe rust virulence and varietal resistance in the foot hill Himalayas of Nepal

Creator: Sharma, S.
Creator: Duveiller, E.
Creator: Chandra Bahadur Karki
Creator: Dhruba Bahadur Thapa
Creator: Sharma, R.C.
Creator: Joshi, A.K.
Year: 2015
URI: https://hdl.handle.net/10883/21474
Language: English
Publisher: David Publishing
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
Country focus: Nepal
Place of Publication: New York (USA)
Pages: 477-485
Issue: 7
Volume: 5
DOI: 10.17265/2161-6264/2015.07.005
Keywords: Stripe Rust
Description: Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst) is an important disease of wheat (Triticum aestivum) in Nepal, which is a part of the Himalayas stretching over the North of Nepal, India, Pakistan, Bhutan and beyond. Wheat production plays a crucial role in food security of the marginal hill farmers of Nepal. Frequent epidemics of the rust have caused huge loss in farmer's field. Periodic monitoring during 1980-2008 showed that changes in virulence occurred during this period. The objective of this study was to evaluate Pst resistance and its effective genes in wheat genotypes. For this, trap nurseries, wheat stripe rust differentials, commercial cultivars and advanced breeding lines were tested under artificial epiphytotic and natural hot spots conditions during 2005 to 2010. Four genes (Yr5, Yr10, Yr15 and YrSp) consistently showed resistance to the prevailing races. The gene Yr9 and Yr27 in combinations with Yr18 were found effective. Other lines with combination of minor genes were also found effective. The genotypes Amadina, Kukuna, Tukuru, Kakatsi and Buck Buck widely used in breeding program were resistant. The cultivation of varieties WK1204, Gautam, Gaura and Dhaulagiri have ensured genetic diversity for the rust resistance and slowed down frequent occurrence of epidemics. The findings of these studies could help in developing effective varietal resistance program in the sub-continent.
Agrovoc: WHEAT
Agrovoc: PUCCINIA STRIIFORMIS
Agrovoc: DISEASE RESISTANCE
Agrovoc: VIRULENCE
Agrovoc: RUSTS
Agrovoc: TRITICUM AESTIVUM
ISSN: 2161-6264
Journal: Journal of Agricultural Science and Technology B


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

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