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Scientia Silvae Sinicae ›› 2002, Vol. 38 ›› Issue (3): 49-51.doi: 10.11707/j.1001-7488.20020309

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KARYOTYPES AND KARYOTYPICAL EVOLUTION IN FIVE CYCAS SPECIES OF CHINA

Zheng Fangqing,Zhang Xiaoping,Pan Aifang,He Tianhua   

  1. Fuzhou National Forest Park Fuzhou350012;College of Life Sciences,Peking University Beijing100871
  • Received:1999-11-27 Revised:1900-01-01 Online:2002-05-25 Published:2002-05-25

Abstract:

Karyotypes of five species of Cycas were studied.The results showed that the numbers of chromosomes of five Cycas species were 2n=22; C.micholitzii:2n=22=4m+4sm+2st+12T;C.multipinnata:2n=22=4m+4sm+2st+12T;C.revoluta:2n=22=4m+6sm+12T;C.taitungensis:2n=22=4m+6sm+12T;C.taiwaniana:2n=22=4m+4sm+2st+12T.The variation and evolution of karyotypes in Cycas were also discussed in this paper.

Key words: Karyotype, Cycas, Evolution