Leclerc M C, Barriel V, Lecointre G, de Reviers B
GDR 1005 CNRS, Service commun de Systématique Moléculaire, Muséum National d'Histoire Naturelle, 43 rue Cuvier, 75231 Paris cedex 05, France.
J Mol Evol. 1998 Jan;46(1):115-20. doi: 10.1007/pl00006278.
Sequences from the two ribosomal DNA internal transcribed spacers (ITS1 and ITS2) were compared among five species of Fucus. Based on the present taxon sampling, parsimony analysis showed that Fucus serratus is the sister-group of the remaining Fucus species when Ascophyllum nodosum was used as an outgroup. The topology of the tree was (Fucus serratus (F. lutarius (F. vesiculosus (F. spiralis + F. ceranoides)))). The extremely low variation observed suggests a very recent radiation of the genus which supports the view widely accepted that the Fucales are among the most evolutionarily advanced of the brown algae. We further note that sequence differences between Fucus and Ascophyllum were 28%: this does not rule out the utility of ITS sequences within the Fucaceae. The very low number of informative positions allows to demonstrate empirically that distance matrix methods group on the basis of symplesiomorphies.
对五种墨角藻属物种的两个核糖体DNA内转录间隔区（ITS1和ITS2）序列进行了比较。基于目前的分类群抽样，简约分析表明，以泡叶藻作为外类群时，锯齿墨角藻是其余墨角藻属物种的姐妹群。树的拓扑结构为（锯齿墨角藻（卢氏墨角藻（囊链藻（旋卷墨角藻 + 角叉菜墨角藻））））。观察到的极低变异表明该属是最近才辐射演化而来的，这支持了一个被广泛接受的观点，即墨角藻目是褐藻中进化最先进的类群之一。我们还注意到，墨角藻属和泡叶藻属之间的序列差异为28%：这并不排除ITS序列在墨角藻科中的实用性。信息位点的数量非常少，这使得我们能够通过实证证明距离矩阵方法是基于共近裔性状进行分类的。
