Genomic signatures of recombination in a natural population of the bdelloid rotifer Adineta vaga
| Autor: | Evgeny S. Gerasimov, Irina A. Yushenova, Aleksey A. Penin, Sergey Naumenko, Yan R. Galimov, Svetlana G. Ozerova, Arthur O. Zalevsky, Georgii A. Bazykin, E. Mnatsakanova, Irina R. Arkhipova, Alexey S. Kondrashov, Fernando Santos Rodríguez, Maria D. Logacheva, Olga A. Vakhrusheva, Tatiana V. Neretina |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Linkage disequilibrium Science Population Rotifera General Physics and Astronomy Evolutionary biology Biology 010603 evolutionary biology 01 natural sciences Article Evolutionary genetics Linkage Disequilibrium General Biochemistry Genetics and Molecular Biology 03 medical and health sciences Molecular evolution Phylogenetics Genetic variation Genetics Animals education Alleles Phylogeny Recombination Genetic education.field_of_study Genome Multidisciplinary Whole Genome Sequencing Human evolutionary genetics General Chemistry Sexual reproduction Genetics Population Germ Cells 030104 developmental biology Haplotypes Natural population growth |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-17 (2020) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Sexual reproduction is almost ubiquitous among extant eukaryotes. As most asexual lineages are short-lived, abandoning sex is commonly regarded as an evolutionary dead end. Still, putative anciently asexual lineages challenge this view. One of the most striking examples are bdelloid rotifers, microscopic freshwater invertebrates believed to have completely abandoned sexual reproduction tens of Myr ago. Here, we compare whole genomes of 11 wild-caught individuals of the bdelloid rotifer Adineta vaga and present evidence that some patterns in its genetic variation are incompatible with strict clonality and lack of genetic exchange. These patterns include genotype proportions close to Hardy-Weinberg expectations within loci, lack of linkage disequilibrium between distant loci, incongruent haplotype phylogenies across the genome, and evidence for hybridization between divergent lineages. Analysis of triallelic sites independently corroborates these findings. Our results provide evidence for interindividual genetic exchange and recombination in A. vaga, a species previously thought to be anciently asexual. Ancient, asexual lineages are rare as a lack of recombination is usually an evolutionary dead end. Here, authors compare complete genomes of 11 individual bdelloid rotifers that suggest evidence of regular genetic exchange between individuals in a species that was previously thought to be asexual. |
| Databáze: | OpenAIRE |
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