Genetics of host-pathogen interactions in the Pyrenophora teres f. teres (net form) – barley ( Hordeum vulgare) pathosystem
Identifieur interne : 001027 ( Main/Exploration ); précédent : 001026; suivant : 001028Genetics of host-pathogen interactions in the Pyrenophora teres f. teres (net form) – barley ( Hordeum vulgare) pathosystem
Auteurs : Olga Afanasenko [Russie] ; Nina Mironenko [Russie] ; Olga Filatova [Russie] ; Doris Kopahnke [Allemagne] ; Ilona Kr Mer [Allemagne] ; Frank Ordon [Allemagne]Source :
- European Journal of Plant Pathology [ 0929-1873 ] ; 2007.
Abstract
Abstract: The genetics of host-pathogen interactions in the Hordeum vulgare – P. teres f. teres pathosystem was studied in twelve resistant barley accessions, i.e. CI 9825, CI 9819, Diamond, CI 4922, CI 5401, Harbin, c-8755, c-21849, c-8721 c-23874, c-19979, c-15811. F2 analyses of crosses with susceptible genotypes employing various isolates (from Europe, USA, Canada, and Australia) revealed that resistance is mostly isolate-specific and controlled by one or two genes. Segregation in ascospore progeny from two crosses between isolates of different origin revealed that avirulence in P. teres is also determined by one or two genes. An epistatic effect of suppressor genes on avirulence genes is proposed for the genetics of virulence to Diamond, Harbin, CI 5401 and c-8721 in the fungal crosses D (181-6 × A80) and F (H-22 × 92-178/9). Segregation in F2 of crosses of three new sources of resistance (c-23874, c-19979, c-15811) to the susceptible cv. Pirkka was studied in laboratory and greenhouse tests by using seven P. teres isolates, i.e. 181-6, d8-3, d8-4, d9-1, d9-4, F4 and F74. In addition, virulence to these barley accessions of ascospore progeny from crosses of the same isolates was studied. Based on these studies it was concluded that depending on the isolate used, resistance of c-23874 is determined at least by two genes and in c-19979 and c-15811 by three genes. The results of this parallel analyses of genetics of resistance and genetics of virulence allows the postulation of a gene–for–gene interaction in the P. teres – H. vulgare pathosystem.
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DOI: 10.1007/s10658-006-9093-5
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type="ISSN">0929-1873</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: The genetics of host-pathogen interactions in the Hordeum vulgare – P. teres f. teres pathosystem was studied in twelve resistant barley accessions, i.e. CI 9825, CI 9819, Diamond, CI 4922, CI 5401, Harbin, c-8755, c-21849, c-8721 c-23874, c-19979, c-15811. F2 analyses of crosses with susceptible genotypes employing various isolates (from Europe, USA, Canada, and Australia) revealed that resistance is mostly isolate-specific and controlled by one or two genes. Segregation in ascospore progeny from two crosses between isolates of different origin revealed that avirulence in P. teres is also determined by one or two genes. An epistatic effect of suppressor genes on avirulence genes is proposed for the genetics of virulence to Diamond, Harbin, CI 5401 and c-8721 in the fungal crosses D (181-6 × A80) and F (H-22 × 92-178/9). Segregation in F2 of crosses of three new sources of resistance (c-23874, c-19979, c-15811) to the susceptible cv. Pirkka was studied in laboratory and greenhouse tests by using seven P. teres isolates, i.e. 181-6, d8-3, d8-4, d9-1, d9-4, F4 and F74. In addition, virulence to these barley accessions of ascospore progeny from crosses of the same isolates was studied. Based on these studies it was concluded that depending on the isolate used, resistance of c-23874 is determined at least by two genes and in c-19979 and c-15811 by three genes. The results of this parallel analyses of genetics of resistance and genetics of virulence allows the postulation of a gene–for–gene interaction in the P. teres – H. vulgare pathosystem.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Russie</li></country></list><tree><country name="Russie"><noRegion><name sortKey="Afanasenko, Olga" sort="Afanasenko, Olga" uniqKey="Afanasenko O" first="Olga" last="Afanasenko">Olga Afanasenko</name></noRegion><name sortKey="Filatova, Olga" sort="Filatova, Olga" uniqKey="Filatova O" first="Olga" last="Filatova">Olga Filatova</name><name sortKey="Mironenko, Nina" sort="Mironenko, Nina" uniqKey="Mironenko N" first="Nina" last="Mironenko">Nina Mironenko</name></country><country name="Allemagne"><noRegion><name sortKey="Kopahnke, Doris" sort="Kopahnke, Doris" uniqKey="Kopahnke D" first="Doris" last="Kopahnke">Doris Kopahnke</name></noRegion><name sortKey="Kr Mer, Ilona" sort="Kr Mer, Ilona" uniqKey="Kr Mer I" first="Ilona" last="Kr Mer">Ilona Kr Mer</name><name sortKey="Ordon, Frank" sort="Ordon, Frank" uniqKey="Ordon F" first="Frank" last="Ordon">Frank Ordon</name><name sortKey="Ordon, Frank" sort="Ordon, Frank" uniqKey="Ordon F" first="Frank" last="Ordon">Frank Ordon</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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