A novel QTL for Septoria speckled leaf blotch resistance in barley (Hordeum vulgare L.) accession PI 643302 by whole-genome QTL mapping
Article
Article Title | A novel QTL for Septoria speckled leaf blotch resistance in barley (Hordeum vulgare L.) accession PI 643302 by whole-genome QTL mapping |
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ERA Journal ID | 2384 |
Article Category | Article |
Authors | Yu, G. T. (Author), Franckowiak, J. D. (Author), Lee, S. H. (Author), Horsley, R. D. (Author) and Neate, S. M. (Author) |
Journal Title | Genome |
Journal Citation | 53 (8), pp. 630-636 |
Number of Pages | 7 |
Year | 2010 |
Place of Publication | Ottawa, Canada |
ISSN | 0008-4093 |
0831-2796 | |
1480-3321 | |
Digital Object Identifier (DOI) | https://doi.org/10.1139/G10-032 |
Web Address (URL) | http://www.nrcresearchpress.com/doi/abs/10.1139/G10-032 |
Abstract | Septoria speckled leaf blotch (SSLB), caused by Septoria passerinii, is one of the most important foliar diseases of barley (Hordeum vulgare L.) in North America. The primary problem caused by this disease is substantial yield loss. The objective of this study was to determine the chromosomal location of SSLB resistance genes in the barley accession PI 643302. A recombinant inbred line population was developed from the cross Zhenongda 7/PI 643302. PI 643302 is resistant while Zhenongda 7 is susceptible to SSLB. The population was phenotyped for SSLB resistance in five experiments in the greenhouse. A linkage map comprising 113 molecular markers was constructed and simplified composite interval mapping was performed. Two QTLs, designated QrSp-1H and QrSP-2H, were found. QrSp-1H was found on the short arm of chromosome 1H (1HS) in all five experiments and showed a large effect against SSLB. Based on the location of QrSp-1H, it is likely the SSLB resistance gene Rsp2. The QTL QrSp-2H mapped to the distal region on the long arm of chromosome 2H (2HL), had a smaller effect than QrSp-1H, and was also detected consistently in all five experiments. A QTL for SSLB resistance in the same region on chromosome 2H has not been reported previously in either cultivated or wild barley; thus, QrSp-2H is a new QTL for SSLB resistance in barley. |
Keywords | barley; gene mapping; QTL; resistance; Septoria speckled leaf blotch |
ANZSRC Field of Research 2020 | 310704. Microbial genetics |
310805. Plant pathology | |
300406. Crop and pasture improvement (incl. selection and breeding) | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | North Dakota State University, United States |
Department of Primary Industries and Fisheries, Queensland | |
Samuel Roberts Noble Foundation, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q26w3/a-novel-qtl-for-septoria-speckled-leaf-blotch-resistance-in-barley-hordeum-vulgare-l-accession-pi-643302-by-whole-genome-qtl-mapping
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