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A karyomorphological study on 5 species of Swertia (Gentianaceae)

HE Ting nong,WANG Wei,XUE Chun ying (Northwest Plateau Institute of Biology,the Chinese Academy of Sciences,Xining 810001)  
he present paper reports the karyomorphological data of 5 species of Swertia .The karyotype formulae are as follows: S.teraptera 2n=14=4m+8sm+2st=2L+6M 2+4M 1+2S; S.wolfangiana 2n=28=12m+14sm+2st=6L+8M 2+8M 1+6S; S.bifolia 2n=28=14m+4sm+10st=2L+14M 2+10M 1+2S; S.franchetiana 2n=20=6m+12sm+2st=8M 2+12M 1; S.hickinii 2n=20=8m+4sm+8st=8M 2+12M 1.The chromosome numbers and karyotypes of all species are reported for the first time.
【Fund】: The project w as supported by the Foundation of the Chinese Academ y
【CateGory Index】: Q949
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