Geographical and environmental range expansion through polyploidy in wild potatoes (Solanum section Petota)

By Robert J. Hijmans, T. Gavrilenko, S. Stephenson, J. Bamberg, A. Salas, D. Spooner. 2007

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Phylogenetic insights into Andean plant diversification (2014, background): “Petota (Solanaceae), a high concentration of polyploid species relative to total number of species was reported for the Northern Andes, while diploid species predominate in the Central Andes (Hijmans et al., 2007).”
The Incidence of Polyploidy in Natural Plant Populations: Major Patterns and Evolutionary Processes (2013, background): “Hijmans et al. (2007) estimated that, due to inadequate sampling, only 28% of the mixedploidy species in this group have likely been discovered.”
The scaling of genome size and cell size limits maximum rates of photosynthesis with implications for ecological strategies (2019, background): “Furthermore, these tests frequently find that diploids exhibit greater habitat breadth than polyploids (Petit and Thompson 1999; Hijmans et al. 2007; Brittingham et al. 2018; Castro et al. 2019).”