3.7 Evolutionary Relationships Based on Genetic Distances
In the whole mt genome and all of the PCGs(except cox2)，the K2P distance patterns of the host insect to the other 7 Hepialidae are similar.The three smallest K2P distances from the host insect are those to T.renzhiensis，T.gonggaensis and H.xiaojinensis，while the two greatest distances are those to E.signifer and N.hunanensis(Fig.7).This finding suggests a close relationship of this host insect to T.renzhiensis，T.gonggaensis and H.xiaojinensis and a lineage of E.signifer and N.hunanensis relatively distinct from the host insect.This result is concordant with the evolutionary relationships inferred based on phylogenetic analysis.
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Fig.7 K2P genetic distances between Thitarodes sp.and the other 7 sequenced Hepialidae for various regions of the mt genome
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