passages.id: split_1_test_339_passage
passages.type: progene_text
passages.text: It is concluded that the ancestral virus with a bipartite genome , as found in the genus Omegatetravirus , likely evolved from a virus with an unsegmented genome , as found in the genus Betatetravirus , through evolution of the subgenomic RNA into a separate genomic component , with the accompanying loss of the capsid gene from the longer genomic RNA .