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Lr72 confers resistance to leaf rust in durum wheat cultivar Atil C2000

Author: Herrera-Foessel, S.A.
Author: Huerta-Espino, J.
Author: Calvo-Salazar, V.
Author: Lan, C.X
Author: Singh, R.P.
Year: 2014
ISSN: 0031-949X
ISSN: 1943-7684
URI: https://hdl.handle.net/10883/19767
Abstract: Leaf rust, caused by Puccinia triticina (Pt), has become a globally important disease for durum wheat (Triticum turgidum subsp. durum) since the detection of race group BBG/BN, which renders ineffective a widely deployed seedling resistance gene present in several popular cultivars including Mexican cultivars Altar C84 and Atil C2000. The resistance gene continues to play a key role in protecting durum wheat against bread wheat–predominant races since virulence among this race group has not been found. We developed F3 and F5mapping populations from a cross between Atil C2000 and the susceptible line Atred #1. Resistance was characterized by greenhouse seedling tests using three Pt races. Segregation tests indicated the presence of a single gene, which was mapped to the distal end of 7BS by bulk segregant analysis. The closest marker, wmc606, was located 5.5 cM proximal to the gene. No known leaf rust resistance genes are reported in this region; this gene was therefore designated as Lr72. The presence of Lr72 was further investigated in greenhouse tests in a collection of durum wheat using 13 Pt races. It was concluded that at least one additional gene protects durum wheat from bread wheat–predominant Ptraces.
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
Country focus: Mexico
Place of Publication: United States
Pages: 631-635
Issue: 5
Volume: 98
DOI: 10.1094/PDIS-07-13-0741-RE
Keywords: Durum Wheat
Keywords: BBG/BN
Keywords: Segregation Tests
Agrovoc: HARD WHEAT
Agrovoc: RUSTS
Agrovoc: PUCCINIA RECONDITA
Agrovoc: SCREENING
Agrovoc: GENETIC RESISTANCE
Related Datasets: https://apsjournals.apsnet.org/doi/suppl/10.1094/PDIS-07-13-0741-RE
Journal: Plant Disease


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

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