TRANSGRESSIVE PHENOTYPES. “Interspecific hybridization and allopolyploidy provide the opportunity for new, transgressive characters to evolve. Transgressive characters can be observed at all levels from the transcriptome to inflorescence morphology and may arise through novel cis-trans interactions in the genome or by ‘mixing and matching’ of different metabolic pathways found in the parents.”
https://genomebiology.biomedcentral.com/articles/10.1186/gb-2013-14-6-207