Mammals with Small Populations Do Not Exhibit Larger Genomes
| Autor: | David Alvarez-Ponce, Scott William Roy, Adam B. Roddy |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
population genomics
Biology AcademicSubjects/SCI01180 Genome Evolution Molecular Orders of magnitude (bit rate) Population genomics Genome Size Genetics Animals Molecular Biology Genome size Discoveries Ecology Evolution Behavior and Systematics Selection (genetic algorithm) evolution of complexity Mammals Population Density genome complexity Population size AcademicSubjects/SCI01130 Small population size Biological Evolution Evolutionary biology C-value C-value paradox drift barrier hypothesis |
| Zdroj: | Molecular Biology and Evolution |
| ISSN: | 1537-1719 |
| Popis: | Genome size in cellular organisms varies by six orders of magnitude, yet the cause of this large variation remains unexplained. The influential Drift-Barrier Hypothesis proposes that large genomes tend to evolve in small populations due to inefficient selection. However, to our knowledge no explicit tests of the Drift-Barrier Hypothesis have been reported. We performed the first explicit test, by comparing estimated census population size and genome size in mammals while incorporating potential covariates and the effect of shared evolutionary history. We found a lack of correlation between census population size and genome size among 199 species of mammals. These results suggest that population size is not the predominant factor influencing genome size and that the Drift-Barrier Hypothesis should be considered provisional. |
| Databáze: | OpenAIRE |
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