論文 - 詳細
| RRC ID | 45867 |
|---|---|
| 著者 | Theologidis I, Chelo IM, Goy C, Teotónio H. |
| タイトル | Reproductive assurance drives transitions to self-fertilization in experimental Caenorhabditis elegans. |
| ジャーナル | BMC Biol |
| Abstract |
BACKGROUND:Evolutionary transitions from outcrossing between individuals to selfing are partly responsible for the great diversity of animal and plant reproduction systems. The hypothesis of 'reproductive assurance' suggests that transitions to selfing occur because selfers that are able to reproduce on their own ensure the persistence of populations in environments where mates or pollination agents are unavailable. Here we test this hypothesis by performing experimental evolution in Caenorhabditis elegans. RESULTS:We show that self-compatible hermaphrodites provide reproductive assurance to a male-female population facing a novel environment where outcrossing is limiting. Invasions of hermaphrodites in male-female populations, and subsequent experimental evolution in the novel environment, led to successful transitions to selfing and adaptation. Adaptation was not due to the loss of males during transitions, as shown by evolution experiments in exclusively hermaphroditic populations and in male-hermaphrodite populations. Instead, adaptation was due to the displacement of females by hermaphrodites. Genotyping of single-nucleotide polymorphisms further indicated that the observed evolution of selfing rates was not due to selection of standing genetic diversity. Finally, numerical modelling and evolution experiments in male-female populations demonstrate that the improvement of male fitness components may diminish the opportunity for reproductive assurance. CONCLUSIONS:Our findings support the hypothesis that reproductive assurance can drive the transition from outcrossing to selfing, and further suggest that the success of transitions to selfing hinges on adaptation of obligate outcrossing populations to the environment where outcrossing was once a limiting factor. |
| 巻・号 | 12 |
| ページ | 93 |
| 公開日 | 2014-11-5 |
| DOI | 10.1186/s12915-014-0093-1 |
| PII | s12915-014-0093-1 |
| PMID | 25369737 |
| PMC | PMC4234830 |
| MeSH | Adaptation, Physiological Alleles Animals Biological Evolution Caenorhabditis elegans / genetics Caenorhabditis elegans / physiology* Caenorhabditis elegans Proteins / genetics Caenorhabditis elegans Proteins / metabolism DNA, Helminth / genetics DNA-Binding Proteins / genetics DNA-Binding Proteins / metabolism Environment Female Gene Frequency Genotype Genotyping Techniques Green Fluorescent Proteins / genetics Green Fluorescent Proteins / metabolism Male Pollination Polymorphism, Single Nucleotide Reproduction* Selection, Genetic Self-Fertilization* Sequence Analysis, DNA Transcription Factors / genetics Transcription Factors / metabolism |
| IF | 6.765 |
| 引用数 | 24 |
| WOS 分野 | BIOLOGY |
| リソース情報 | |
| 線虫 | tm3055 |