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万年青Ls-RRNA 5′端核苷酸序列及进化意义

屈良鹄, 余小强, 洪德元, 鲁迎青   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1990-11-10 发布日期:1990-11-10
  • 通讯作者: 屈良鹄

Ls-RRNA 5′ Nucleotide Sequence of Rohdea japonica (Liliaceae) and its Evolutionary Significance

Qu Liang-Hu, Yu Xiao-Qiang, Hong De-Yuan, Lu Ying-Qing   

  • Received:1900-01-01 Revised:1900-01-01 Online:1990-11-10 Published:1990-11-10
  • Contact: Qu Liang-Hu

摘要:

本工作准确测定了万年青Rohdea japonica(Thunb.)Roth Ls-rRNA 5'端347个
核苷酸序列。以该序列与其他五种被子植物及一种红藻已发表的序列为基础构造的系统树与
一般所接受的植物分类系统十分吻合,而且说明这一方法对被子植物不同科、属之间的差异有
良好的分辨率。我们的分析结果还表明,万年青与禾本科之间的差异很大,它们的分歧可能发
生在单子叶植物起源的早期。

关键词: 万年青, rRNA, 核苷酸序列, 系统学

Abstract:

The sequence of Ls-rRNA 5' terminal 347 nucleotides of Rohdea japonica (Thunb.)
Roth   has been precisely determined.  A phylogenetic tree constructed based on the rRNA
nucleotide sequences of this and five other angiosperm species and an algal species (Porphyri-
dium purpureum) is in accordance with the taxonomical system generally accepted. The result
indicates that this method is of a high resolution for revealing differences and relationships am-
ong families and genera. It is also shown by our result that the difference between Rohdea and
the Poaceae is greater than that between the Solanaceae and the Brassicaceae. Therefore, it may
be considered that the divergence between these two groups took place at early stage of evolu-
tion of monocotyledons.

Key words: Rohdea japonica (Thunb.) Roth, rRNA, nucleotide sequence, systematics