TITLE

Natural taxonomy in light of horizontal gene transfer

AUTHOR(S)
Andam, Cheryl P.; Williams, David; Gogarten, J. Peter
PUB. DATE
September 2010
SOURCE
Biology & Philosophy;Sep2010, Vol. 25 Issue 4, p589
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We discuss the impact of horizontal gene transfer (HGT) on phylogenetic reconstruction and taxonomy. We review the power of HGT as a creative force in assembling new metabolic pathways, and we discuss the impact that HGT has on phylogenetic reconstruction. On one hand, shared derived characters are created through transferred genes that persist in the recipient lineage, either because they were adaptive in the recipient lineage or because they resulted in a functional replacement. On the other hand, taxonomic patterns in microbial phylogenies might also be created through biased gene transfer. The agreement between different molecular phylogenies has encouraged interpretation of the consensus signal as reflecting organismal history or as the tree of cell divisions; however, to date the extent to which the consensus reflects shared organismal ancestry and to which it reflects highways of gene sharing and biased gene transfer remains an open question. Preferential patterns of gene exchange act as a homogenizing force in creating and maintaining microbial groups, generating taxonomic patterns that are indistinguishable to those created by shared ancestry. To understand the evolution of higher bacterial taxonomic units, concepts usually applied in population genetics need to be applied.
ACCESSION #
53021211

 

Related Articles

  • Phylogenetic analysis of cetrarioid lichens with globose ascospores. Saag, Andres; Randlane, Tiina; Thell, Arne; Obermayer, Walter // Proceedings of the Estonian Academy of Sciences, Biology, Ecolog;Jun2002, Vol. 51 Issue 2, p103 

    The group of cetrarioid lichens with globose ascospores includes 37 species from eight genera. Phylogenetic analysis, using program PAUP 3.1.1, was carried out on two different data sets — morphological (incl. anatomical and chemical) and molecular characters (ITS1, 5.8S, and ITS2 rDNA...

  • Population Evolution in the 20th-Century Easter Island: Endogamy and Admixture. Hernandez, Miquel; Garcia-Moro, Clara // Human Biology;Apr2000, Vol. 72 Issue 2, p359 

    Studies the 20th century evolution of the Rapanui population of Easter Island to analyze the process of admixture. Population evolution; Births and surnames; Isonymy and inbreeding.

  • Estimating Effective Population Size and Migration Rates From Genetic Samples Over Space and Time. Jinliang Wang; Whitlock, Michael C. // Genetics;Jan2003, Vol. 163 Issue 1, p429 

    In the past, moment and likelihood methods have been developed to estimate the effective population size (N[sub e]) on the basis of the observed changes of marker allele frequencies over time, and these have been applied to a large variety of species and populations. Such methods invariably make...

  • Measuring Support and Finding Unsupported Relationships in Supertrees. Wilkinson, Mark; Pisani, Davide; Cotton, James A.; Corfe, Ian // Systematic Biology;Oct2005, Vol. 54 Issue 5, p823 

    This article presents an alternative view of the correspondences between relationships in supertrees and imput trees. Associated measures that quantify these correspondences are also defined. The authors focus nearly completely on support for supertree clades. The goal of this article is to...

  • Phylogenetic relationships of Gagea Salisb. (Liliaceae) in Italy, inferred from molecular and morphological data matrices. Peruzzi, L.; Peterson, A.; Tison, J.-M.; Peterson, J. // Plant Systematics & Evolution;Dec2008, Vol. 276 Issue 3/4, p219 

    All known Italian Gagea species (23) representing seven out of 14 sections were included in this study. Morphological, molecular and combined data support the basal position of G. trinervia ( Anthericoides). According to the molecular data, the sections Anthericoides, Lloydia, Gagea, Minimae and...

  • Lobopodian phylogeny reanalysed. Legg, David A.; Xiaoya Ma; Wolfe, Joanna M.; Ortega-Hernández, Javier; Edgecombe, Gregory D.; Sutton, Mark D. // Nature;8/11/2011, Vol. 476 Issue 7359, pE2 

    Arising from J. Liu et al. 470, 526-530 (2011); Liu et al. replyLiu et al. described an 'armoured' lobopodian, Diania cactiformis, from the Chengjiang Lagerstätte (China; Cambrian, stage 3); this fossil bears potentially arthropod-like articulated and possibly sclerotized appendages, but...

  • Unleashing the Force of Cladistics? Metazoan Phylogenetics and Hypothesis Testing. Jenner, Ronald A. // Integrative & Comparative Biology;Feb2003, Vol. 43 Issue 1, p207 

    Presents several case studies to assess how cladistic analyses of metazoan morphology have contributed to the understanding of animal evolution. Epistemology of cladistics and hypothesis testing; Interpretation of ciliary bands in the Spiralia; Comparison of character selection between...

  • The tree of life: introduction to an evolutionary debate. O'Malley, Maureen A.; Martin, William; Dupré, John // Biology & Philosophy;Sep2010, Vol. 25 Issue 4, p441 

    The ‘Tree of Life’ is intended to represent the pattern of evolutionary processes that result in bifurcating species lineages. Often justified in reference to Darwin’s discussions of trees, the Tree of Life has run up against numerous challenges especially in regard to...

  • Using jackknife to assess the quality of gene order phylogenies. Jian Shi; Yiwei Zhang; Haiwei Luo; Jijun Tang // BMC Bioinformatics;2010, Vol. 11, p168 

    Background: In recent years, gene order data has attracted increasing attention from both biologists and computer scientists as a new type of data for phylogenetic analysis. If gene orders are viewed as one character with a large number of states, traditional bootstrap procedures cannot be...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics