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新疆独尾草属植物的核型分析

Karyotype Analysis of Eremurus in Xinjiang

  • 摘要: 对新疆独尾草属(Eremurus)植物的核型进行了研究。核型公式如下:阿尔泰独尾草E.altaicus(Pall.)Stev.2n=2x=14=4m+8sm+2st;异翅独尾草E.anisopterus(Kar. et Kir)Regel2n=4x=28=4m+4sm+20st;粗柄独尾草E.inderiensis(M.Bieb)Regel2n=2x=14=10sm+4st。首次发现古尔班通古特沙漠南缘所产的异翅独尾草2n=4x=28,与前人报道其为二倍体2n=2x=14的结果不一致。

     

    Abstract: The karyotypes of Eremurus in Xinjiang were studied.Their karyotype formulas are as follows: E.altaicus(Pall.) Stev.2n=2x=14=4m+8sm+2st;E.anisopterus(Kar.et Kir)Regel 2n=4x=28=4m+4sm+20st;E.inderiensis(M.Bieb)Regel 2n=2x=14=10sm+4st.Our study has shown that E.anisopterus,a species occurring in the southern margin of the Gurbantunggut Desert,was a tetraploid with 2n=4x=28,a new chromosome count for this species which had been previously reported as a diploid with 2n=2x=14.The karyotype evolution of Eremurus in Xinjiang is discussed.

     

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