Karyotypes Of Trib.Polygoneae Species From Shangdong And Systematic Position Of Polygonum Perfoliatum L.Based On ITS Sequences

Karyotypes Of Trib. Polygoneae Species From Shangdong And Systematic position Of Polygonum perfoliatum L. Based On ITS SequencesThere are different opinions about the phytogenetic classification of Trib.Polygoneae species. Trib.Polygoneae was divided into 3 genera (Tovara ,Koenigia, polygonnm) by Steward. However Tzvel thought Trib.Polygoneae contained 13 genera.namely, Bistorta, Persicara, Tovara. Truellum, Chylocalyx, Cephalophilon Knorringia, Aconogonum. Fagopynim, Polygonnm, Tiniaria, Koenigia. Reynoutria. Trib.Polygoneae was divided into 5 genera (Koenigia , Polygonum, Fagopyrum, Reynoutria, Fallopia) in "Flora Europaea". There are different opinions about genera and some genera's scope .The classification of trib. Polygoneae species still needs further research.In this paper ,it was studied Karyotypes of trib. Polygoneae species from Shandong and some of trib. Polygoneae species ITS(internal transcribed spaces). Trib. Polygoneae species expect Fagopynim basic chromosome numbers are X=10, 12. Polyploid is a common phenomenon in Trib. Polygoneae . Results based on ITS sequences indicate: Polygonum perfoliatum should regard as genera. Section Avicularia, Section Bistorta, Section Cephalophilon and Section Aconogonon should regard as genera., Polygonum amphibium should set up genera .