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作 者 ：张文驹 闵天禄

期 刊 ：云南植物研究 1995年 17卷 01期 页码：1-3

关键词：山茶属；古茶组；核型；

Keywords:Camellia,

摘 要 ：对8种山茶属古茶组(Sect.Archecamellia Sealy)植物的核型进行了研究。结果如下：Camellia euphlebia 2n=2x=30=21m＋9sm；C．pigguoensis 2n=2x=30=23m(lsat)+7sm；C．pingguoenis var.terminalis 2n=2x=30=24m＋6sm；C．flavida 2x=30=23m＋7sm；C．parivpetala 2n=2x=30=21m(lsat)＋9sm；C．tonkinensis 2n=2x=30=26m＋3sm＋lst； C．huana 2n=2x=30=22m＋8sm； C．fascicularis 2n=2x=30=18m＋12sm 1sat);C.phbipetala 2n=2x=30=18m(2sat)＋10sm(lsat)＋2st．其中4种1变种的核型为首次报道。总结古茶组植物的所有核型资料，发现具有下列特征：(1)古茶组植物的染色体数目一致，都是2n=30，全为二倍体；(2)组内种间核型比较相似，常有20—24条m染色体，6—10条sm染色体，0—2条st染色体，随体常为2个；(3)整个组的核型的不对称性较低，几乎全是2A型，结合该组植物的形态和地理分布特点，认为在古茶组植物的进化中起主导作用的是基因突变和重组。

Abstract:8 species of yellow Camellia were cytotaxonomically studied in this work, 7 of which be-long to Sect. Archecamellia. Some of karyotypes are reported for the first time. The results are show asfollows:C.euphlebia2n=2x== 30=21 m+9sm;C.pingguoensis 2n=2x=30=23m(lsat)+7sm;C.pingguoenis var.terminalis 2n = 2x = 30 = 24m+6sm; C. fiavida 2n =:: 2x = 30 = 23m+7sm;C.parvipetala2n=2x=30=21m(lsat)+9sm;C.tonkinensis 2n=2x=30=26m+3sm+lst; C.huana 2n = 2x = 30 = 22m+8sm;C.fascicularis 2n=2x=30=18m+12sm(lsat); C. pubipetala 2n=2x=30= 18m(2sat)+10sm(lsat)+2st. All cytological data of Sect. Archecamellia were collected. Three characters of the karyotypes of Sect.

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