Shoshani J
Department of Biological Sciences, Wayne State University, Detroit, Michigan 48202.
Mol Biol Evol. 1986 May;3(3):222-42. doi: 10.1093/oxfordjournals.molbev.a040389.
In an attempt to resolve the "bushy" part at the root of the eutherian tree, 182 nondental morphological characters from 100 species (79 extant and 21 extinct; 98 mammalian and 2 nonmammalian) were analyzed using two maximum-parsimony tree-building algorithms. Parallel analyses of 2,258 pairwise immunodiffusion comparisons with chicken antisera on 101 mammalian species and of amino acid sequence data of alpha and beta hemoglobins and other published protein sequences were also carried out. The morphological and molecular phylogenies agree in depicting the infraclass Eutheria as consisting of five major clades (thus resolving part of the "bush"). Rates of evolution were also found to be similar in the two types of phylogenies.
为了解决真兽类谱系根部的“多分支”部分，使用两种最大简约建树算法分析了来自100个物种（79个现存物种和21个已灭绝物种；98个哺乳动物物种和2个非哺乳动物物种）的182个非牙齿形态特征。还对101个哺乳动物物种进行了2258次与鸡抗血清的成对免疫扩散比较的平行分析，以及对α和β血红蛋白的氨基酸序列数据和其他已发表的蛋白质序列进行了分析。形态学和分子系统发育学在将真兽下纲描述为由五个主要分支组成方面是一致的（从而解决了部分“多分支”问题）。在这两种类型的系统发育学中也发现进化速率相似。
