POLYPLOIDY & ADAPTATION

Genomics of Extreme Adaptation in Polyploids

photo credit to Nikita Tichomirov

A. lyrata habitat

photo credit to Nikita Tichomirov

Siberian Arabidopsis lyrata growing at MPIPZ

photo credit to Stephen Mahony

Tetraploid Australian burrowing frog Neobatrachus sudellae

photo credit to Stephen Mahony

photo credit to Nikita Tichomirov

Arabidopsis lyrata at Lena river bank

photo credit to Nikita Tichomirov

photo credit to Stephen Mahony

Diploid Australian burrowing frog Neobatrachus pictus; the reference genome for Neobatrachus genus

photo credit to Stephen Mahony

Research

Polyploid organisms have more than two sets of chromosomes as a result of a whole-genome duplication or a whole-genome hybridization. Polyploidy is often associated with extreme environments, where it can be triggered by external stress and in case of a successful establishment, can provide an adaptive advantage in harsh conditions. At the same time, the establishment of polyploid populations includes cellular adaptation to another extreme condition — polyploidy itself. We study the interplay between adaptation and polyploidy to understand molecular mechanisms of adaptation to doubled genomes, genomic and organismal consequences of polyploidization, and its ecological importance.

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