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《Shandong Agricultural Sciences》 2007-05
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Karyotype Analysis of Cynanchum Bungei Decne

SONG Zhen-qiao,WANG Jian-hua,LIU Jin-ling,WANG Hong-gang(Medicinal Plant Laboratory in Agronomy College,Shandong Agricultural University,Taian 271018,China)  
The chromosome number and karyotype of Cynanchum bungei Decne was studied with the conventional plant root tip squashing method.The results showed that the somatic chromosome number of Cynanchum bungei Decne was 2n=44,and ten pairs belonged to metacentric type,9 pairs were submetacentric type and 3 pairs belonged to subtelocentric type.The karyotype formula of Cynanchum bungei Decne was K(2n)=44=20m+18sm +6st.The average length of twenty-two pairs chromosomes was 1.73 μm,which belonged to the small-sized ones.The length ratio of the longest to the shortest was 1.86,and the chromosomes of which arm ratio beyond 2∶1 was 10,which took up 45% in all chromosomes.So its karyotype was 2A type.
【Fund】: 山东省优秀中青年科学家科研奖励基金(03BS049)
【CateGory Index】: S567.239
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