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Molecular Marker Mapping of Leaf Rust Resistance Gene Lr46 and Its Association with Stripe Rust Resistance Gene Yr29 in Wheat

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Relation http://oar.icrisat.org/5735/
http://dx.doi.org/10.1094/PHYTO.2003.93.2.153
 
Title Molecular Marker Mapping of Leaf Rust Resistance Gene Lr46 and Its Association with Stripe Rust Resistance Gene Yr29 in Wheat
 
Creator William, M
Singh, R P
Huerta-Espino, J
Islas, S O
Hoisington, D A
 
Subject Genetics and Genomics
Wheat
 
Description Leaf and stripe rusts, caused by Puccinia triticina and P. striiformis, respectively, are globally important fungal diseases of wheat that cause significant annual yield losses. A gene that confers slow rusting resistance to leaf rust, designated as Lr46, has recently been located on wheat chromosome 1B. The objectives of our study were to establish the precise genomic location of gene Lr46 using molecular approaches and to determine if there was an association of this locus with adult plant resistance to stripe rust. A population of 146 F5 and F6 lines produced from the cross of susceptible ‘Avocet S’ with resistant ‘Pavon 76’ was developed and classified for leaf rust and stripe rust severity for three seasons. Using patterns of segregation for the two diseases, we estimated that at least two genes with additive effects conferred resistance to leaf rust and three to four genes conferred resistance to stripe rust. Bulked segregant analysis and linkage mapping using amplified fragment length polymorphisms with the ‘Avocet’ × ‘Pavon 76’ population, F3 progeny lines of a single chromosome recombinant line population from the cross ‘Lalbahadur’ × ‘Lalbahadur (Pavon 1B)’, and the International Triticeae Mapping Initiative population established the genomic location of Lr46 at the distal end of the long arm of wheat chromosome 1B. A gene that is closely linked to Lr46 and confers moderate levels of adult plant resistance to stripe rust is identified and designated as Yr29.
 
Publisher American Phytopathological Society
 
Date 2003
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/5735/1/PHYTO_93_2_153-159_2003.pdf
William, M and Singh, R P and Huerta-Espino, J and Islas, S O and Hoisington, D A (2003) Molecular Marker Mapping of Leaf Rust Resistance Gene Lr46 and Its Association with Stripe Rust Resistance Gene Yr29 in Wheat. Phytopathology , 93 (2). pp. 153-159. ISSN 0031-949X