passages.id: split_6_test_1746_passage
passages.type: progene_text
passages.text: The phylogenetic tree reconstructed by the combined 18S rRNA - matK gene analysis using the maximum parsimony method showed that P. vietnamensis was sympatric with other Panax species and had a close relationship with P. japonicus var. major and P. pseudo - ginseng subsp. himalaicus .