Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Possibility for speciation events with non-recombining genomes: the bdelloid rotifers |
| Abstract | Is speciation possible in the absence of sexual recombination? Theory predicts that reproductive isolation is a key mechanism in special events; thus, organisms that have non-recombining genomes should not have species as we know them. Bdelloid rotifers, a group of microscopic aquatic animals, have been dubbed an 'evolutionary scandals' because they do not know the theory and more than 450 obligately parthenogenetic species are known from morphology. I will provide empirical evidence to test three alternative hypotheses to explain the apparent evolutionary paradox of bdelloid rotifers: 1) bdelloids may have some hidden sex and thus bdelloid species are a consequence of reproductive isolation; 2) bdelloid species do not exist and are merely figments of taxonomists' imagination; 3) speciation may happen even in the absence of sexual recombination. As a concluding remark, I will try to convince that sexual recombination not only is not so important as a mechanism favouring speciation, but actually it could be a hindrance to speciation events. |
| Source | Evolution of non-recombining chromosomes and genomes, Lubecca, Germania, 15 giugno 2014 |
| Keywords | AsexualityEvolutionSpeciation |
| Year | 2014 |
| Type | Abstract in atti di convegno |
| Authors | Diego Fontaneto |
| Text | 330060 2014 Asexuality Evolution Speciation Possibility for speciation events with non recombining genomes the bdelloid rotifers Diego Fontaneto CNR ISE Published version Evolution of non recombining chromosomes and genomes Lubecca, Germania 15 giugno 2014 Internazionale Contributo Is speciation possible in the absence of sexual recombination Theory predicts that reproductive isolation is a key mechanism in special events; thus, organisms that have non recombining genomes should not have species as we know them. Bdelloid rotifers, a group of microscopic aquatic animals, have been dubbed an evolutionary scandals because they do not know the theory and more than 450 obligately parthenogenetic species are known from morphology. I will provide empirical evidence to test three alternative hypotheses to explain the apparent evolutionary paradox of bdelloid rotifers 1 bdelloids may have some hidden sex and thus bdelloid species are a consequence of reproductive isolation; 2 bdelloid species do not exist and are merely figments of taxonomists imagination; 3 speciation may happen even in the absence of sexual recombination. As a concluding remark, I will try to convince that sexual recombination not only is not so important as a mechanism favouring speciation, but actually it could be a hindrance to speciation events. Abstract 2014_Abstract_Lubecca_9.pdf Abstract in atti di convegno diego.fontaneto FONTANETO DIEGO TA.P04.016.004 Ecologia teorica e applicata degli ecosistemi acquatici |