Discordant evolution of organellar genomes in peas (Pisum L.)
| Autor: | Vera S. Bogdanova, Oleg E. Kosterin, Gennadiy V. Vasiliev, Anatoliy V. Mglinets, Natalia V. Shatskaya |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Germplasm Mitochondrial DNA Cytoplasm Nuclear gene 010603 evolutionary biology 01 natural sciences Genome Pisum Evolution Molecular 03 medical and health sciences Genetics Plastids Plastid Molecular Biology Ecology Evolution Behavior and Systematics Phylogeny Cell Nucleus Phylogenetic tree biology fungi Peas food and beverages Microevolution biology.organism_classification Europe 030104 developmental biology Evolutionary biology Genome Mitochondrial Hybridization Genetic |
| Zdroj: | Molecular phylogenetics and evolution. 160 |
| ISSN: | 1095-9513 |
| Popis: | Plastids and mitochondria have their own small genomes, which do not undergo meiotic recombination and may have evolutionary fates different from each other and that of the nuclear genome. For the first time, we sequenced mitochondrial genomes of pea (Pisum L.) from 42 accessions mostly representing diverse wild germplasm from throughout the wild pea geographical range. Six structural types of the pea mitochondrial genome were revealed. From the same accessions, plastid genomes were sequenced. Phylogenetic trees based on the plastid and mitochondrial genomes were compared. The topologies of these trees were highly discordant, implying not less than six events of hybridisation between diverged wild peas in the past, with plastids and mitochondria differently inherited by the descendants. Such discordant inheritance of organelles could have been driven by plastid-nuclear incompatibility, which is known to be widespread in crosses involving wild peas and affects organellar inheritance. The topology of the phylogenetic tree based on nucleotide sequences of a nuclear gene, His5, encoding a histone H1 subtype, corresponded to the current taxonomy and resembled that based on the plastid genome. Wild peas (Pisum sativum subsp. elatius s.l.) inhabiting Southern Europe were shown to be of hybrid origin, resulting from crosses of peas related to those presently inhabiting the eastern Mediterranean in a broad sense. These results highlight the roles of hybridisation and cytonuclear conflict in shaping plant microevolution. |
| Databáze: | OpenAIRE |
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