Format: ORAL

Terezie Mandakova

Central European Institute of Technology, Masaryk University, 62500 Brno, Czech Republic

Whole-genome duplications are pervasive across land plant phylogenies, with pronounced frequency in ferns and angiosperms. These duplications have been instrumental in propelling the evolution of key innovations, fostering diversification within numerous angiosperm clades and lineages. Notably, diversification is not instigated by genome doubling itself. Instead, the differentiation of primary polyploid populations, facilitated by various processes, culminates in post-polyploid genome diploidization. Structural diploidization orchestrates a gradual reversion of the polyploid genome to a functionally diploid-like state through frequent chromosomal rearrangements, giving rise to dysploid changes. These alterations, in turn, hold the potential to induce reproductive isolation among post-polyploid offspring, significantly contributing to speciation and cladogenetic events. This intricate interplay between genome dynamics and evolutionary outcomes underscores the importance of understanding the role of post-polyploid diploidization in shaping plant diversity.