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Genetic Analysis of Leaf Rust Resistance in Six Durum Wheat Genotypes

Author: Loladze, A.
Author: Kthiri, D.
Author: Pozniak, C.
Author: Ammar, K.
Year: 2014
ISSN: 0031-949X
ISSN: 1943-7684
Descriptors: Puccinia Triticina
Descriptors: Fungal Disease
Descriptors: adult plant resistance
Descriptors: Triticum turgidum
Abstract: Leaf rust, caused by Puccinia triticina, is one of the main fungal diseases limiting durum wheat production. This study aimed to characterize previously undescribed genes for leaf rust resistance in durum wheat. Six different resistant durum genotypes were crossed to two susceptible International Maize and Wheat Improvement Center (CIMMYT) lines and the resulting F1, F2, and F3 progenies were evaluated for leaf rust reactions in the field and under greenhouse conditions. In addition, allelism tests were conducted. The results of the study indicated that most genotypes carried single effective dominant or recessive seedling resistance genes; the only exception to this was genotype Gaza, which carried one adult plant and one seedling resistance gene. In addition, it was concluded that the resistance genes identified in the current study were neither allelic to LrCamayo or Lr61, nor were they related to Lr3 or Lr14a, the genes that already are either ineffective or are considered to be vulnerable for breeding purposes. A complicated allelic or linkage relationship between the identified genes is discussed. The results of the study will be useful for breeding for durable resistance by creating polygenic complexes.
Language: English
Publisher: American Phytopathological Society
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 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: United States
Pages: 1322-1328
Journal issue: 12
Journal: Phytopathology
Journal volume: 104
DOI: 10.1094/PHYTO-03-14-0065-R
Audicence: Researchers

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

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