“…For instance, the evolution of pregnancy in mammals was associated with transcriptional network rewiring driven by transposable elements ( Lynch et al, 2011 , 2015 ). In yeasts, the loss of an AT rich cis -regulatory element in the promoters of oxidative phosphorylation and mitochondrial ribosomal protein genes following a Whole Genome Duplication event (WGD) allowed for the appearance of a respiro-fermentative life style in extent post-WGD species ( Ihmels et al, 2005 ; Habib et al, 2012 ; Thompson et al, 2013 ). Comparative transcriptomics (i.e., the comparison of gene expression profiles in different species) has been extensively used in yeasts to identify changes in gene regulation that accompanied the appearance of new physiological properties ( Ihmels et al, 2005 ; Lavoie et al, 2010 ; Wapinski et al, 2010 ), to achieve model phylogeny for regulatory evolution ( Roy et al, 2013 ; Thompson et al, 2013 ) or to predict transcriptional regulatory networks in non-model species ( Koch et al, 2017 ).…”