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Quantitative trait loci and epistatic interactions in barley conferring resistance to net type net blotch (Pyrenophora teres f. teres) isolates.

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Gupta, S., Loughman, R., Li, C.D., Cakir, M., Platz, G., Westcott, S., Bradley, J., Broughton, S. and Lance, R. (2010) Quantitative trait loci and epistatic interactions in barley conferring resistance to net type net blotch (Pyrenophora teres f. teres) isolates. Plant Breeding, 129 (4). pp. 362-368.

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Article Link: http://dx.doi.org/10.1111/j.1439-0523.2009.01716.x

Publisher URL: http://onlinelibrary.wiley.com


Net type net blotch (NTNB) is an important barley disease in Australia and elsewhere, with significant yield reduction. This trait is important in selection along with other traits of quality and agronomic value. Two-hundred doubled-haploid lines were generated through anther culture from a cross between 'Pompadour' and 'Stirling'. Quantitative trait loci (QTL) were identified against five isolates of Pyrenophora teres f. teres, which represent virulences across Australia. QTL were mapped on chromosomes 3H and 6H using simple sequence repeat (SSR) markers. The resistance locus on 6H was detected with all isolates while the 3H locus was detected with two isolates. The 6H QTL from 'Pompadour' contributed resistance to isolates 97NB1, 95NB100 and NB81, whereas 6H QTL from 'Stirling' contributed resistance to isolates NB50 and NB52B. The 3H QTL from 'Pompadour' contributed resistance to NB50 and NB52B. Significant epistatic interactions were detected between QTL on 3H and 6H. These resistance QTL are a useful resource and identifying closely linked SSR markers with allelic combinations will facilitate in marker-assisted selection to develop NTNB resistant breeding lines.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science
Business groups:Crop and Food Science
Additional Information:© Blackwell Verlag GmbH.
Keywords:Hordeum vulgare; simple sequence repeat; double haploid; quantitative trait loci (QTL) mapping; doubled-haploid population; adult-plant resistance; Drechslera teres; genomic regions; spring barley; consensus map; linkage map; major genes; spot blotch; markers.
Subjects:Science > Biology > Genetics > Quantitative genetics (esp. Quantitative Trait Loci (QTL) articles)
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Organic plant protection. Biological control
Plant pests and diseases > Individual or types of plants or trees > Barley
Live Archive:18 Nov 2010 06:35
Last Modified:03 Sep 2021 16:43

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