AI Article Synopsis
- The study analyzed genetic sequences of 9 Gynostemma species to understand their evolutionary relationships, using Hemsleya macrosperma as an outgroup.
- The analysis revealed that G. pentaphyllum var. pentaphyllum did not form a clear monophyletic group in the phylogenetic trees generated.
- There is uncertainty regarding whether G. longipes and G. laxum should be classified as separate species, and the study supports the current classification of subgenus units within Gynostemma.
Article Abstract
The sequences of ITS, matK, rbcL and psbA-trnH of 9 Gynostemma species or variety including 38 samples were compared and analyzed by molecular phylogeny method. Hemsleya macrosperma was designated as outgroup. The MP and NJ phylogenetic tree of Gynostemma was built based on ITS sequence, the results of PAUP phylogenetic analysis showed the following results: (1) The eight individuals of G. pentaphyllum var. pentaphyllum were not supported as monophyletic in the strict consensus trees and NJ trees. (2) It is suspected whether G. longipes and G. laxum should be classified as the independent species. (3)The classification of subgenus units of Gynostemma plants is supported.
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