Mapping spot blotch resistance genes in four barley populations
Article
Article Title | Mapping spot blotch resistance genes in four barley populations |
---|---|
ERA Journal ID | 2621 |
Article Category | Article |
Authors | Bovill, Jessica (Author), Lehmensiek, Anke (Author), Sutherland, Mark W. (Author), Platz, Greg. J. (Author), Usher, Terry (Author), Franckowiak, Jerome (Author) and Mace, Emma (Author) |
Journal Title | Molecular Breeding: new strategies in plant improvement |
Journal Citation | 26 (4), pp. 653-666 |
Number of Pages | 14 |
Year | 2010 |
Place of Publication | Dordrecht, Netherlands |
ISSN | 1380-3743 |
1572-9788 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11032-010-9401-9 |
Web Address (URL) | http://springerlink.metapress.com/openurl.asp?genre=journal&issn=1380-3743 |
Abstract | Bipolaris sorokiniana (teleomorph: Cochliobolus sativus) is the fungal pathogen responsible for spot blotch in barley (Hordeum vulgare L.) and occurs worldwide in warmer, humid growing conditions. Current Australian barley varieties are largely susceptible to this disease and attempts are being made to introduce sources of resistance from North America. In this study we have compared chromosomal locations of spot blotch resistance reactions in four North American two-rowed barley lines; the North Dakota lines ND11231-12 and ND11231-11 and the Canadian lines TR251 and WPG8412-9-2-1. Diversity Arrays Technology (DArT)-based PCR, expressed sequence tag (EST) and SSR markers have been mapped across four populations derived from crosses between susceptible parental lines and these four resistant parents to determine the location of resistance loci. Quantitative trait loci (QTL) conferring resistance to spot blotch in adult plants (APR) were detected on chromosomes 3HS and 7HS. In contrast, seedling resistance (SLR) was controlled solely by a locus on chromosome 7HS. The phenotypic variance explained by the APR QTL on 3HS was between 16 and 25% and the phenotypic variance explained by the 7HS APR QTL was between 8 and 42% across the four populations. The SLR QTL on 7HS explained between 52 to 64% of the phenotypic variance. An examination of the pedigrees of these resistance sources supports the common identity of resistance in these lines and indicates that only a limited number of major resistance loci are available in current two-rowed germplasm. |
Keywords | spot blotch resistance; barley; Bipolaris sorokiniana; Cochliobolus sativus; disease resistance; MAS; QTL |
ANZSRC Field of Research 2020 | 310805. Plant pathology |
310705. Mycology | |
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 | Centre for Systems Biology |
Department of Primary Industries and Fisheries, Queensland | |
Department of Employment, Economic Development and Innovation, Queensland |
https://research.usq.edu.au/item/q016y/mapping-spot-blotch-resistance-genes-in-four-barley-populations
Download files
1900
total views667
total downloads3
views this month1
downloads this month