Does one subgenome become dominant in the formation and evolution of a polyploid?

Contrary to the now widely held views that subgenome biases in polyploids are the results of conflicts among the subgenomes and one of the parental subgenomes generally retains more genes which are more highly expressed, available results show that subgenome biases mainly reflect legacy from the progenitors and that they can be detected before the completion of polyploidization events. Further, there is no convincing evidence that the magnitudes of subgenome biases have significantly changed during evolution for any of the allopolyploid species assessed.