Comparative sequence analysis of wheat and barley powdery mildew fungi reveals gene colinearity, dates divergence and indicates host-pathogen co-evolution
| Autor: | Fabian H. Jenny, Francis Parlange, Pietro Spanu, James Abbott, Timothy A. Burgis, Beat Keller, Thomas Wicker, Jan P. Buchmann, Simone Oberhaensli |
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| Přispěvatelé: | University of Zurich, Wicker, T |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
Transposable element Sequence analysis Genetic Speciation Molecular Sequence Data Blumeria graminis Sequence Homology 580 Plants (Botany) 01 natural sciences Microbiology Genome Synteny Evolution Molecular 03 medical and health sciences Intergenic region Ascomycota 10126 Department of Plant and Microbial Biology 1311 Genetics Genetics DNA Fungal Gene Triticum 030304 developmental biology Plant Diseases 0303 health sciences Polymorphism Genetic biology Host (biology) 2404 Microbiology Hordeum Sequence Analysis DNA biology.organism_classification DNA Transposable Elements DNA Intergenic Powdery mildew 010606 plant biology & botany |
| Zdroj: | Fungal Genet Biol Fungal Genetics and Biology |
| Popis: | The two fungal pathogens Blumeria graminis f. sp. tritici (B.g. tritici) and hordei (B.g. hordei) cause powdery mildew specifically in wheat or barley. They have the same life cycle, but their growth is restricted to the respective host. Here, we compared the sequences of two loci in both cereal mildews to determine their divergence time and their relationship with the evolution of their hosts. We sequenced a total of 273.3 kb derived from B.g. tritici BAC sequences and compared them with the orthologous regions in the B.g. hordei genome. Protein-coding genes were colinear and well conserved. In contrast, the intergenic regions showed very low conservation mostly due to different integration patterns of transposable elements. To estimate the divergence time of B.g. tritici and B.g. hordei, we used conserved intergenic sequences including orthologous transposable elements. This revealed that B.g. tritici and B.g. hordei have diverged about 10 million years ago (MYA), two million years after wheat and barley (12 MYA). These data suggest that B.g. tritici and B.g. hordei have co-evolved with their hosts during most of their evolutionary history after host divergence, possibly after a short phase of host expansion when the same pathogen could still grow on the two diverged hosts. |
| Databáze: | OpenAIRE |
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