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Journal ArticleDOI

Resolution of the early placental mammal radiation using Bayesian phylogenetics

TLDR
Crown-group Eutheria may have their most recent common ancestry in the Southern Hemisphere (Gondwana), and placental phylogeny is investigated using Bayesian and maximum-likelihood methods and a 16.4-kilobase molecular data set.
Abstract
Molecular phylogenetic studies have resolved placental mammals into four major groups, but have not established the full hierarchy of interordinal relationships, including the position of the root. The latter is critical for understanding the early biogeographic history of placentals. We investigated placental phylogeny using Bayesian and maximum-likelihood methods and a 16.4-kilobase molecular data set. Interordinal relationships are almost entirely resolved. The basal split is between Afrotheria and other placentals, at about 103 million years, and may be accounted for by the separation of South America and Africa in the Cretaceous. Crown-group Eutheria may have their most recent common ancestry in the Southern Hemisphere (Gondwana).

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Ecological and evolutionary forces shaping microbial diversity in the human intestine.

TL;DR: The human gut is populated with as many as 100 trillion cells, whose collective genome, the microbiome, is a reflection of evolutionary selection pressures acting at the level of the host and at thelevel of the microbial cell.
Journal ArticleDOI

Sequence and comparative analysis of the chicken genome provide unique perspectives on vertebrate evolution

LaDeana W. Hillier, +174 more
- 09 Dec 2004 - 
TL;DR: A draft genome sequence of the red jungle fowl, Gallus gallus, provides a new perspective on vertebrate genome evolution, while also improving the annotation of mammalian genomes.
Journal ArticleDOI

Detection of nonneutral substitution rates on mammalian phylogenies

TL;DR: By applying phyloP to mammalian multiple alignments from the ENCODE project, it shed light on patterns of conservation/acceleration in known and predicted functional elements, approximate fractions of sites subject to constraint, and differences in clade-specific selection in the primate and glires clades.
Journal ArticleDOI

Historical biogeography, ecology and species richness

TL;DR: The chasm that has developed between ecology and historical biogeography is described, some of the important questions that have fallen into it and how it might be bridged, and a model that can help explain the latitudinal gradient of species richness is expanded.
References
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Journal ArticleDOI

Mammalian phylogeny: shaking the tree.

TL;DR: Recent palaeontological discoveries and the correspondence between molecular and morphological results provide fresh insight on the deep structure of mammalian phylogeny but has yet to resolve some important issues.
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Molecular phylogenetics: state-of-the-art methods for looking into the past.

TL;DR: The most important and exciting methods currently available to the molecular phylogeneticist are discussed, allowing both a wide variety of phylogenetic inferences from sequence data and robust statistical assessment of all results.
Journal ArticleDOI

Towards Resolving the Interordinal Relationships of Placental Mammals

TL;DR: It is shown that progress towards a reliable phylogeny for placental mammals at the ordinal level continues apace, particularly work not incorporated in the remainder of this issue or published elsewhere.
Journal ArticleDOI

Estimating divergence dates from molecular sequences

TL;DR: This work presents a maximum-likelihood approach to estimating divergence times that deals explicitly with the problem of rate variation, and presents tests of the accuracy of the method, which show it to be robust to the effects of some modes of rate variations.
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