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作 者 ：申敏;吴之坤;乔琴;张长芹

期 刊 ：武汉植物学研究 2009年 27卷 2期 页码：127-132

关键词：灯台报春组；染色体数目；核型；系统演化；

Keywords:Section Proliferae, Chromosome number, Karyotype, Systematic evolution,

摘 要 ：对报春花科(Primulaceae)报春花属(Primula)灯台报春组植物Section Proliferae的7种报春进行了细胞学研究,其中腾冲灯台报春和川东灯台报春的核型分析为首次报道,结合已报道的灯台报春组其它植物的细胞学资料进行统计分析,结果表明灯台报春组植物在染色体基数、染色体形态、着丝点位置及染色体对称性上都具有很高的一致性,在灯台报春组有核型记录的种类中,其核型都属于Stebbins的2A型或2B型,核型差异很小,染色体基数均为x=11,推测其可能与报春花属中具有相同染色体基数的组亲缘关系更近。结合已发表的灯台报春组植物的细胞学资料及它们的形态特征,对其系统演化关系进行了比较分析,以期对该组的系统学及演化关系提供一些证据。

Abstract:Chromosome number and karyomorphology of seven species from section Proliferae of Primula(Primulaceae) were investigated.The karyomorphology of two species:P.chrysochlora Balf.f.et Ward and P.mallophylla Balf.f.were reported for the first time.By analysing the data in the seven species and available data published in this section,the result suggested that most species showed far-reaching conformity in size,shape of the chromosome and the main arrangement of the constrictions.The difference of karyomorphology between species was small,and most species were of median-centromeric and submedian-centromeric,which belonged to Stebbins’ 2A or 2B.The basic chromosome number is x=11,which supported that sect.Proliferae was close to some sections with same basic chromosome number in Primula.To offer cytology proof for systematic evolution in section Proliferae,we also combined the published data of cytology and morphological feature in section Proliferae for comparative analysis.

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