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作 者 ：李林初；刘永强；王玉勤；刘钢

期 刊 ：云南植物研究 1996年 18卷 04期 页码：1-3

关键词：核型；北美乔柏；北美香柏；西方翠柏；侧柏亚科；细胞分类学；

Keywords:Karyotype,

摘 要 ：分析了北美乔柏（Thuja plicata）、北美香柏（T.occidentalis）和西方翠柏（Calocedrusdecurrens）的核型，它们的核型公式分别为K（2n）=22=16m=6sm（2SAT），20m (2SAT）＋2sm 和 20m(2SAT）＋2sm。北美乔柏的核型为首次报道。经对侧柏亚科10个属（22种）的核型的比较分析，似见南半球5属（Callitris，Actinostrobus, Libocedrus，Microbiola，Widdrington）和侧柏属（Platycladus）及 Tetraclinis 最为原始，罗汉柏属（Thujopsis）和崖柏属（Thuja）最进化，翠柏属（Calocedrus）居中。本文还讨论了翠柏属、侧柏属及南半球属的分类位置。

Abstract:The present paper deals with the karyotype analyses of Thup Plicata, T. occidentalis and Calocedrus decurrens. The karyotype formulas of the species are K(2n)= 22= 16m +6sm(2SAT), 20m(2SAT)+2sm and 20m(2SAT)+2sm respectively. The karyotype of T.plicata is reported for the first time. The comparison among the karyotypes of 10 genera in Thujoideae (Ta- ble 2, Fig.2) shows that the genera in the Southern Hemisphere (including Callitris, Aclinostrobus, Libocedrus, Microbiota and Widdringtonia) and Tetraclinis and Platycladus in the Northern Hemi- sphere may be the most primitive, Thuppsis and Thup the most advanced, and Calocedrus inter- mediate. The paper also discusses the classificatory positions of Calocedrus, Platycladus and the southern genera.

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