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New genes for leaf rust resistance in CIMMYT durum wheats

Author: Herrera Foessel, S.A.
Author: Singh, R.P.
Author: Huerta Espino, J.
Author: Yuen, J.
Author: Djurle, A.
Year: 2005
ISSN: 0191-2917
ISSN: 1943-7692
URI: http://hdl.handle.net/10883/2432
Abstract: Leaf rust, caused by Puccinia triticina, has become an important disease of durum wheat (Triticum turgidum) in Mexico since the detection in 2001 of BBG/BN, a new race virulent on all common cultivars and on more than 80% of CIMMYT's durum wheat collection. We investigated the genetic basis and diversity of resistance in nine durum genotypes that are highly resistant to the new race. These resistant durums were crossed with the susceptible cv. Atil C2000 and intercrossed in a half diallel arrangement. Five diverse sources of resistance were identified by evaluating parents, F1, F2, and F3 populations in greenhouse and/or field trials under artificial epidemics of race BBG/BN. The same pair of partially dominant complementary genes determined resistance in Jupare C2001, Hualita, and Pohowera. Somateria and Llareta INIA shared the same dominant resistance gene, whereas a partially dominant gene conferred resistance in two sister lines, Guayacan 2 and Guayacan INIA. A different partially dominant gene present in Storlom was linked in repulsion to another partially dominant gene in Camayo. These diverse resistance genes can be used effectively to control leaf rust, preferably by deploying them in combinations.
Format: PDF
Language: English
Publisher: American Phytopathological Society (APS)
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
Region: Global
Pages: 809-814
Issue: 8
Volume: 89
DOI: 10.1094/PD-89-0809
Agrovoc: WHEAT
Agrovoc: RUSTS
Agrovoc: GENETIC RESISTANCE
Agrovoc: CROSSBREEDING
Agrovoc: GENETIC INHERITANCE
Journal: Plant Disease


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

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