常見例句The paper summarizes the applications of DNA sequences (cpDNA, nrDNA and mtDNA) in bryophyte phylogenesis, and discusses the strategies of gene fragment selection. 本文綜述了DNA序列（葉綠體基因組、核基因組和線粒體基因組）在苔蘚分子系統(tǒng)學(xué)中的應(yīng)用，探討了基因片段的選擇策略。The internal transcribed spacer (ITS) region (ITS1, ITS2 and 5.8S rDNA) of the nuclear ribosomal DNA (nrDNA) was amplified via PCR in 28 taxa of Abies Mill. 由PCR反應(yīng)擴(kuò)增了 2 8種冷杉屬 (AbiesMill.;)Methods The nrDNA ITS sequence(including ITS1,5.8S rDNA,ITS2,and partial 18S rDNA and 26S rDNA) of L.japonicus and its 3 adulterant species were amplified and sequenced,and CLUSTRAL X and MEGA software was employed for analysis. 方法對4種益母草屬植物分別進(jìn)行ITS序列的PCR擴(kuò)增和測序;并運(yùn)用CLUSTRALX和MEGA軟件進(jìn)行分析。 結(jié)果測得4種植物的ITS序列;包括ITS1、5.;8S和ITS2全長序列以及18S、26S部分序列;A Preliminary Phylogenetic Analysis of ITS nrDNA Sequences in Water-lilies 序列的分子系統(tǒng)發(fā)育分析A Taxonomic Study on Rhododendron.Lusing RAPD Technique and nrDNA ITS 杜鵑屬植物RAPD分類研究及nrDNA ITS區(qū)序列分析研究Phylogenetic Relationships of Saccharum and Related Species Inferred from Se quence Analysis of the nrDNA ITS Region 區(qū)序列研究甘蔗屬及其近緣屬種的系統(tǒng)發(fā)育關(guān)系 返回 nrDNA