A perspective on the centre-periphery hypothesis: some examples in <i>Petunia</i> and other Neotropical taxa

Abstract The Neotropical region holds high plant species richness, and these originated under the influence of climate changes, tectonic processes ecological factors. Several genera Solanaceae have appeared diversified quickly in area, producing a number lineages. Petunia is endemic to grasslands southern South America constitutes one young groups. From this perspective, I aim identify driving diversification Petunia, review works describing genetic morphological diversity for genus compare evolutionary patterns with other from Neotropics. primary process explaining variability seems be migration during Quaternary period, as observed herbaceous America. Molecular, even mating system seem follow centre-periphery hypothesis.