Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Different diversification rates between sexual and asexual organisms |
| Abstract | Patterns of diversity reflect the balance between speciation and extinction over time. Here we estimate net diversification rates for samples of sexual and asexual rotifers using phylogenetic reconstructions from sequence data of one mtDNA locus, cytochrome oxidase c subunit I. All four clades of bdelloid rotifers, obligate asexuals, had higher number of species per clade and significantly higher accumulation of diversification events towards the root of the trees than the four clades of their sexual relatives, the monogonont rotifers. Such differences were robust to confounding effects of number of analysed sequences, haplotype diversity, overall genetic divergence, age of the clades or geographic coverage. Our results support the idea that differences in diversification rates could thus be ascribed to different mechanisms of speciation, with ecological speciation as the most plausible mechanism for asexual organisms. |
| Source | Evolutionary biology (Online) 39, pp. 262–270 |
| Journal | Evolutionary biology (Online) |
| Editor | Springer Science + Business Media, Norwell, MA, Stati Uniti d'America |
| Year | 2012 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11692-012-9161-z |
| Authors | Fontaneto, Diego ;Tang, Cuong Q. ;Obertegger, Ulrike ;Leasi, Francesca ;Barraclough, Timothy G. |
| Text | 220736 2012 10.1007/s11692 012 9161 z Different diversification rates between sexual and asexual organisms Fontaneto, Diego ;Tang, Cuong Q. ;Obertegger, Ulrike ;Leasi, Francesca ;Barraclough, Timothy G. CNR ISE, Pallanza Verbania ; Division of Biology, Imperial College London ;Sustainable Agro ecosystems and Bioresources Department, Edmund Mach Foundation, IASMA Research and Innovation Centre, Via E. Mach 2, 38010 San Michele all Adige TN Patterns of diversity reflect the balance between speciation and extinction over time. Here we estimate net diversification rates for samples of sexual and asexual rotifers using phylogenetic reconstructions from sequence data of one mtDNA locus, cytochrome oxidase c subunit I. All four clades of bdelloid rotifers, obligate asexuals, had higher number of species per clade and significantly higher accumulation of diversification events towards the root of the trees than the four clades of their sexual relatives, the monogonont rotifers. Such differences were robust to confounding effects of number of analysed sequences, haplotype diversity, overall genetic divergence, age of the clades or geographic coverage. Our results support the idea that differences in diversification rates could thus be ascribed to different mechanisms of speciation, with ecological speciation as the most plausible mechanism for asexual organisms. 39 http //www.springerlink.com/content/465614p50v350g64/ Articolo in rivista Springer Science Business Media 1934 2845 Evolutionary biology Online Evolutionary biology Online Evolutionary biology Online Evol Biol Online diego.fontaneto FONTANETO DIEGO TA.P04.016.004 Ecologia teorica e applicata degli ecosistemi acquatici |