Show simple item record

Resistance of some Iraqi bread wheat cultivars to Puccinia triticina

Author: Al-Maaroof, E.M.
Author: Singh, R.P.
Author: Huerta-Espino, J.
Author: Rattu, A.
Year: 2005
ISSN: 0031-9465
ISSN: 1593-2095
URI: http://hdl.handle.net/10883/2520
Abstract: Brown rust (leaf rust) caused by Puccinia triticina is one of the most serious diseases of wheat worldwide. In Iraq the occurrence and distribution of brown rust is more regular and uniform than that of other wheat rusts. with yield losses as high as 44% on susceptible wheat cultivars in commercial fields. Recently several promising wheat (Triticum aestivum) cultivars with different levels of rust resistance have been released in Iraq. The present work was conducted to postulate the resistance genes in twenty-two Iraqi bread wheat cultivars by testing them with thirteen Mexican races of P. triticina. ‘Thatcher’ near-isogenic lines were used as testers for known resistance genes. Ten day old seedling sets were artificially inoculated with each race, and the infection type was recorded ten days later. Field reactions of the cultivars with the predominantly Iraqi races were determined under field conditions for three years. Results revealed that the Iraqi wheat cultivars possessed brown rust resistance genes Lr1, 3, 10, 13, 16, 17, 23 and 26, either alone or in various combinations. The presence of unknown resistance genes was also postulated in some cultivars. Lr23, derived from Triticum turgidum var. durum, was present in 23% of tested cultivars, whereas Lr13 was present in 18%. The presence of Lr26 in ‘Al-Nour’ and ‘Hashemia’ indicated that they carried the 1BL.1RS wheat-rye translocation. ‘Al-Melad’ displayed resistant reactions to all races used in the study. ‘Tamuz 3’ and ‘Al- Nour’ displayed high adult-plant resistance to P. triticina in the field.
Format: PDF
Language: English
Publisher: Universitá Degli Studi Firenze
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: Iraq
Region: West Asia
Pages: 247-255
Volume: 44
DOI: 10.14601/Phytopathol_Mediterr-1802
Keywords: Brown Rust
Publisher URI: http://www.fupress.net/index.php/pm/article/view/1802
Agrovoc: TRITICUM AESTIVUM
Agrovoc: RUSTS
Agrovoc: PUCCINIA RECONDITA
Agrovoc: GENETIC RESISTANCE
Journal: Phytopathologia Mediterranea


Files in this item

Thumbnail

This item appears in the following Collection(s)

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

Show simple item record