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Plant Diversity ›› 1995, Vol. 17 ›› Issue (01): 1-3.

• 研究论文 •    

山茶属古茶组植物的细胞学研究

张文驹 闵天禄   

  1. 中国科学院昆明植物研究所
  • 出版日期:1995-02-25 发布日期:1995-02-25

KARYOTYPICAL STUDY OF SECT. ARCHECAMELLIA OF GENUS CAMELLIA

ZHANG Wen-Ju MING Tian-Lu   

  1. Kunming Institute of Botany, Chinese Academy of Sciences
  • Online:1995-02-25 Published:1995-02-25

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。

关键词: 山茶属, 古茶组, 核型

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.

Key words: Camellia