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对苞萱草的核型研究
孔红;   
甘肃天水师专生物系
摘要:
本文报道用光学显微镜观察对苞萱草Hemerocalisfulva(L.)L.var.op positibracteataH.KongetC.J.Wang,var.nov.的染色体,按全国第一次植物染色体学术讨论会建议的标准进行核型分析。研究结果表明,对苞萱草体细胞染色体数目2n=22,核型公式k(2n)=22=12m+6sm+4st,属于Stebbins核型的2B型。甘肃萱草属植物的核型可分为两大类群,对苞萱草的核型属于第二类群。对苞萱草与萱草H.fulva(L.)L.的核型较接近,为新变种的确立提供了细胞学方面的依据。
关键词:  对苞萱草  染色体  核型  
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