Genetic control of scald resistance in barley landraces
Scald (Rhynchosporium secalis (Oudem.) J.J. Davis pathogenic agent) is one of the most harmful barley diseases. A high variability of this fungi explains the occurrence of new aggressive pathotypes and, accordingly, loss of cultivar resistance. It was found that many recently selected varieties of b...
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| Format: | Article |
| Language: | English |
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Siberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and Breeders
2016-12-01
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| Series: | Вавиловский журнал генетики и селекции |
| Subjects: | |
| Online Access: | https://vavilov.elpub.ru/jour/article/view/807 |
| _version_ | 1797214108399960064 |
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| author | O. N. Soboleva G. S. Konovalova E. E. Radchenko |
| author_facet | O. N. Soboleva G. S. Konovalova E. E. Radchenko |
| author_sort | O. N. Soboleva |
| collection | DOAJ |
| description | Scald (Rhynchosporium secalis (Oudem.) J.J. Davis pathogenic agent) is one of the most harmful barley diseases. A high variability of this fungi explains the occurrence of new aggressive pathotypes and, accordingly, loss of cultivar resistance. It was found that many recently selected varieties of barley and previously identified sources of resistance to R. secalis are now susceptible to the pathogen. There is only one gene, Rrs9, that maintains efficiency against pathogen populations in Russia. The aim of this study is to find donors of genes for effective resistance to scald with the ability to easily transfer this trait for hybridization. The inheritance of scald resistance in 33 barley landraces was studied. Analysis of the interaction between the pathogen test clones and the host plant revealed a difference between the alleles determining fungal resistance in 32 barley forms, the previously effective genes Rrs4, rrs6, rrs7, and currently effective Rrs9. It was found that 30 accessions are protected by new unidentified genes for scald resistance. Accessions k-18398 and k-16231 from China are likely to possess allelic genes for scald resistance, while the gene (or genes) of accession k-31075 from Nepal is allelic to the Rrs9 gene. It was demonstrated by hybridological analysis that accessions k-3307, k-15868, k-18989 and k-3481 are protected by effective genes for scald resistance, which differ from each other and which are not allelic to the Rrs4, rrs6, rrs7 or Rrs9 genes. Accessions k-15868 and k-3481 possess two complementary recessive genes for scald resistance, k-18989 has two recessive genes, and k-3307 carries one recessive gene for pathogen resistance. The resistance genes of these forms are manifested during all the stages of plant ontogenesis. |
| first_indexed | 2024-03-07T16:07:31Z |
| format | Article |
| id | doaj.art-d1d9f4ffc8f74163ba3673edfeac84d3 |
| institution | Directory Open Access Journal |
| issn | 2500-3259 |
| language | English |
| last_indexed | 2024-04-24T11:08:56Z |
| publishDate | 2016-12-01 |
| publisher | Siberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and Breeders |
| record_format | Article |
| series | Вавиловский журнал генетики и селекции |
| spelling | doaj.art-d1d9f4ffc8f74163ba3673edfeac84d32024-04-11T15:30:57ZengSiberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and BreedersВавиловский журнал генетики и селекции2500-32592016-12-0120561662210.18699/VJ16.141522Genetic control of scald resistance in barley landracesO. N. Soboleva0G. S. Konovalova1E. E. Radchenko2N.I. Vavilov Institute of Plant Genetic ResourcesN.I. Vavilov Institute of Plant Genetic ResourcesN.I. Vavilov Institute of Plant Genetic ResourcesScald (Rhynchosporium secalis (Oudem.) J.J. Davis pathogenic agent) is one of the most harmful barley diseases. A high variability of this fungi explains the occurrence of new aggressive pathotypes and, accordingly, loss of cultivar resistance. It was found that many recently selected varieties of barley and previously identified sources of resistance to R. secalis are now susceptible to the pathogen. There is only one gene, Rrs9, that maintains efficiency against pathogen populations in Russia. The aim of this study is to find donors of genes for effective resistance to scald with the ability to easily transfer this trait for hybridization. The inheritance of scald resistance in 33 barley landraces was studied. Analysis of the interaction between the pathogen test clones and the host plant revealed a difference between the alleles determining fungal resistance in 32 barley forms, the previously effective genes Rrs4, rrs6, rrs7, and currently effective Rrs9. It was found that 30 accessions are protected by new unidentified genes for scald resistance. Accessions k-18398 and k-16231 from China are likely to possess allelic genes for scald resistance, while the gene (or genes) of accession k-31075 from Nepal is allelic to the Rrs9 gene. It was demonstrated by hybridological analysis that accessions k-3307, k-15868, k-18989 and k-3481 are protected by effective genes for scald resistance, which differ from each other and which are not allelic to the Rrs4, rrs6, rrs7 or Rrs9 genes. Accessions k-15868 and k-3481 possess two complementary recessive genes for scald resistance, k-18989 has two recessive genes, and k-3307 carries one recessive gene for pathogen resistance. The resistance genes of these forms are manifested during all the stages of plant ontogenesis.https://vavilov.elpub.ru/jour/article/view/807scaldbarleygenes for resistancepathogenvirulenceresistancehybridological analysis. |
| spellingShingle | O. N. Soboleva G. S. Konovalova E. E. Radchenko Genetic control of scald resistance in barley landraces Вавиловский журнал генетики и селекции scald barley genes for resistance pathogen virulence resistance hybridological analysis. |
| title | Genetic control of scald resistance in barley landraces |
| title_full | Genetic control of scald resistance in barley landraces |
| title_fullStr | Genetic control of scald resistance in barley landraces |
| title_full_unstemmed | Genetic control of scald resistance in barley landraces |
| title_short | Genetic control of scald resistance in barley landraces |
| title_sort | genetic control of scald resistance in barley landraces |
| topic | scald barley genes for resistance pathogen virulence resistance hybridological analysis. |
| url | https://vavilov.elpub.ru/jour/article/view/807 |
| work_keys_str_mv | AT onsoboleva geneticcontrolofscaldresistanceinbarleylandraces AT gskonovalova geneticcontrolofscaldresistanceinbarleylandraces AT eeradchenko geneticcontrolofscaldresistanceinbarleylandraces |