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ID 52272
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Author
Kongprakhon, Phinyarat
Cuesta-Marcos, Alfonso
Hayes, Patrick M.
Richardson, Kelley L.
Sirithunya, Pattama
Steffenson, Brian
Toojinda, Theerayuth
Abstract
There are prior reports of Pyricularia grisea-the causal agent of blast of rice-causing disease in barley. In order to determine the specificity of this resistance in barley, we extended our previous mapping efforts to include blast isolates from barley and rice grown in Thailand and we assessed two resistance phenotypes: leaf blast (LB) and neck blast (NB). The largest-effect resistance QTL, on chromosome I H, was associated with NB and LB and is located in a region rich in resistance genes, including QTL conferring resistance to stripe rust (incited by Puccinia striiformis f. sp. hordei) and the mildew (Blumeria graminis f. sp. hordei) resistance gene Mla. The LB, NB and mildew resistance alleles trace to one parent (Baronesse) whereas the stripe rust resistance allele traces to the other parent (BCD47) of the mapping population. Baronesse is the susceptible recurrent parent of a set of near-isogenic lines (NILs) for three stripe rust resistance QTL, including one on 1H. Unigene (EST) derived single nucleotide polymorphism haplotypes of these NILs were aligned with the blast mapping population QTL using Mla as an anchor. Baronesse and all NILs without the 1H introgression were resistant to LB and NB. However, two NILs with the I H introgression were resistant to LB and NB. Both are resistant to stripe rust. Therefore, the QTL conferring resistance to stripe rust is separable by recombination from the blast resistance QTL.
Keywords
rice blast
barley
resistance gene
QTL mapping
near-isolines
Published Date
2009-12
Publication Title
Breeding Science
Volume
volume59
Issue
issue4
Start Page
341
End Page
349
ISSN
1344-7610
Content Type
Journal Article
language
英語
Copyright Holders
Copyright © 2009 by JAPANESE SOCIETY OF BREEDING
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Refereed
True
DOI
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