"Allohexaploid common wheat (Triticum aestivum) arose as a hybrid between allo-tetraploid Triticum turgidum and diploid Aegilops tauschii and is known to out-compete its progenitors in a number of traits, including broader adaptability to various conditions and enhanced resis- tance to biotic and abiotic stresses. It is also possible to create newly synthesized wheat allopolyploids, as hybridizations between species may be followed by spontaneous chromosome doubling. These nascent allohexaploid wheat lines, which also show heterosis and adaptive traits (see figure), may to some extent recapitulate the original genetic status of ancient wheat hybrids.
Li et al. (2014) apply this notion to an analysis of nascent allohexaploid wheat in comparison with its progenitor lines and common wheat."
Via Mary Williams, Shaikhul Islam