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作 者 ：史军伟;徐玲玲;方亮;李同建;赵中伟;廖亮

期 刊 ：武汉植物学研究 2009年 27卷 3期 页码：336-339

关键词：毛茛属；染色体数目；核型；

Keywords:Ranunculus, Chromosome number, Karyotype,

摘 要 ：对中国云南毛茛属(Ranunculus)5种植物核型进行研究,结果表明,毛茛组茴茴蒜(Ranunculus chinensis Bunge)和禺毛茛(R.cantoniensis DC.)核型公式为2n=2x=16=6m+4sm+6st和2n=4x=32=14m+6sm+12st;该组茴茴蒜、禺毛茛和扬子毛茛(R.sieboldiiMiq.)的不同居群核型存在自西向东不对称系数渐增大现象.在美丽毛茛组中,深齿毛茛(R.pulchellus var.stracheyanus Hand.-Mazz.)的中甸居群核型(2n=4x=32=12m+12sm+8st)与青海居群核型(2n=4x=32=24m+8sm)明显不同;毛果高原毛茛(R.tangusticusvar.dasycarpus(Maxim.)L.Liou)染色体数目(2n=40),核型公式(2n=5x=40=30m+10sm)和纳帕海毛茛(R.napahaiensis W.T.Wang & L.Liao)染色体数目(2n=40),核型公式(2n=5x=40=20m+16sm+4st)为首次报道.

Abstract:The karyotypes of five species of genus Ranunculus in Yunnan province of China were analysed.In Sect.Ranunculus,the karyotype formulas of Ranunculus chinensis Bunge and R.cantoniensis DC.were 2n=2x=16=6m+4sm+6st and 2n=4x=32=14m+6sm+12st.The asymmetrical karyotype coefficient of R.chinensis,R.cantoniensis and R.sieboldii Miq.,gradually increased in different population from west to east in China.In Sect.Auricomus,the karyotypes(2n=4x=32=12m+12sm+8st) of R.pulchellus var.stracheyanus Hand.-Mazz.in Zhongdian population was obviously different from that in Qinghai population(2n=4x=32=24m+8sm).The chromosome numbers and karyotypes(2n=40,2n=5x=40=30m+10sm)of R.tangusticus var.dasycarpus(Maxim.)L.Liou and that(2n=40,2n=5x=40=20m+16sm+4st) of R.napahaiensis W.T.Wang & L.Liao are reported for the first time.

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