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作 者 ：李林初；岑益群；许萍；王汉津

期 刊 ：云南植物研究 1996年 18卷 01期 页码：1-3

关键词：核型；进化；细胞分类学；扁柏属；柏木亚科；

Keywords:Karyotype,

摘 要 ：分析了美国扁柏、日本扁柏和日本花柏的核型，它们的核型公式分别为K（2n）=22=22m，20m＋2sm和 14m＋8sm。作者比较了扁柏属6个代表种的核型，发现北美种类有比东亚种类原始的趋势。在柏木亚科中，扁柏属可能最进化，柏木属最原始，福建柏属和杂交属×Cupressocy paris居中。论文还讨论了柏木和福建柏的系统位置。

Abstract:The present paper deals with the karyotype analyses of Chamaecyporis lawsoniana, Ch.obtusa and Ch.pisdera. The karyotype formulas of the species are K(2n)= 22= 22m, 20m+2sm and l4m+8sm respectively. After making comparison among the karyotypes of 6 representative species in Chamaecyporis with related data of geography and fossil, the authors think that the spe- cies lived in North America might be more primitive than that in East Asian. In the Cupressoideae Chamaecyporis may be the most advanced one, Cupressus the most primitive and Fokienia and x Cupressocyparis may be the intermediate taxa. The evolutionary positions of Cupressus funebris and Fokienia hodginsii are also discussed in the paper.

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