Barkman T J, Chenery G, McNeal J R, Lyons-Weiler J, Ellisens W J, Moore G, Wolfe A D, dePamphilis C W
Department of Biology, Institute of Molecular Evolutionary Genetics, and Life Sciences Consortium, Pennsylvania State University, University Park, PA 16802, USA.
Proc Natl Acad Sci U S A. 2000 Nov 21;97(24):13166-71. doi: 10.1073/pnas.220427497.
Plant phylogenetic estimates are most likely to be reliable when congruent evidence is obtained independently from the mitochondrial, plastid, and nuclear genomes with all methods of analysis. Here, results are presented from separate and combined genomic analyses of new and previously published data, including six and nine genes (8, 911 bp and 12,010 bp, respectively) for different subsets of taxa that suggest Amborella + Nymphaeales (water lilies) are the first-branching angiosperm lineage. Before and after tree-independent noise reduction, most individual genomic compartments and methods of analysis estimated the Amborella + Nymphaeales basal topology with high support. Previous phylogenetic estimates placing Amborella alone as the first extant angiosperm branch may have been misled because of a series of specific problems with paralogy, suboptimal outgroups, long-branch taxa, and method dependence. Ancestral character state reconstructions differ between the two topologies and affect inferences about the features of early angiosperms.
当通过所有分析方法从线粒体、质体和核基因组独立获得一致的证据时，植物系统发育估计最有可能是可靠的。在此，展示了对新数据和先前发表的数据进行单独和联合基因组分析的结果，包括针对不同分类单元子集的六个和九个基因（分别为8,911 bp和12,010 bp），这些结果表明无油樟 + 睡莲目（睡莲）是最早分支的被子植物谱系。在进行与树无关的降噪前后，大多数单个基因组部分和分析方法都以高支持率估计了无油樟 + 睡莲目的基部拓扑结构。由于旁系同源性、次优外类群、长分支分类单元和方法依赖性等一系列特定问题，先前将无油樟单独作为第一个现存被子植物分支的系统发育估计可能受到了误导。两种拓扑结构之间的祖先特征状态重建有所不同，并影响对早期被子植物特征的推断。
