Genome Biology & Evolution



Genome Biology and Evolution (GBE) publishes leading original research at the interface between evolutionary biology and genomics. Papers considered for publication report novel evolutionary findings that concern natural genome diversity, population genomics, the structure, function, organisation and expression of genomes, comparative genomics, proteomics, and environmental genomic interactions. Major evolutionary insights from the fields of computational biology, structural biology, developmental biology, and cell biology are also considered, as are theoretical advances in the field of genome evolution. GBE’s scope embraces genome-wide evolutionary investigations at all taxonomic levels and for all forms of life — within populations or across domains. Its aims are to further the understanding of genomes in their evolutionary context and further the understanding of evolution from a genome-wide perspective.

GBE is owned by the Society for Molecular Biology and Evolution (SMBE). Motivated by the continued growth of the field, SMBE conducted a grass-roots survey in 2007 to investigate the needs of the field regarding new publication outlets. The survey elicited a resounding response from members of SMBE and other scientists in the fields of genomics and molecular evolution. The key findings from that survey were that the field wanted an on-line only journal that was devoted specifically to the areas of genome evolution and comparative genomics and that was published under an Open Access model. The response of SMBE was to launch GBE in order to serve those needs of the field. The SMBE meeting attracts about 800 participants each year. As a reflection of the rapid growth of genomic technologies, about half of the science presented at each SMBE meeting is about genomics. With the help of the evolutionary expertise that is gathered in SMBE, GBE is positioned and designed to set the highest standards for papers in the growing field of evolutionary genomics.

GBE is open access and does not require a SMBE membership for journal access.
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Molecular Biology and Evolution

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Comparison of Fused and Segregated Globin Gene Clusters

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Pan troglodytes (P. t.) troglodytes and P. t. verus.

Command-Line Toolkits for Manipulating Sequences, Alignments, and Phylogenetic Trees

2017-02-25

2017-02-21

Chaetoceros, Cyclotella, Discostella, or Nitzschia. It has been speculated that serial replacement of diatom-derived chloroplasts by other diatoms has caused this diversity of chloroplasts. Although previous work suggested that the endosymbionts of Nitzschia origin might not be monophyletic, this has not been seriously investigated. To infer the number of replacements of diatom-derived chloroplasts in dinotoms, we analyzed the phylogenetic affinities of 14 species of dinotoms based on the endosymbiotic rbcL gene and SSU rDNA, and the host SSU rDNA. Resultant phylogenetic trees revealed that six species of Nitzschia were taken up by eight marine dinoflagellate species. Our phylogenies also indicate that four separate diatom species belonging to three genera were incorporated into the five freshwater dinotoms. Particular attention was paid to two crucially closely related species, Durinskia capensis and a novel species, D. kwazulunatalensis, because they possess distantly related Nitzschia species. This study clarified that any of a total of at least 11 diatom species in five genera are employed as an endosymbiont by 14 dinotoms, which infers a more frequent replacement of endosymbionts in the world of dinotoms than previously envisaged.

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Genome Biology & Evolution

Single-Copy Genes as Molecular Markers for Phylogenomic Studies in Seed Plants

2017-05-01

<span class="paragraphSection">Phylogenetic relationships among seed plant taxa, especially within the gymnosperms, remain contested. In contrast to angiosperms, for which several genomic, transcriptomic and phylogenetic resources are available, there are few, if any, molecular markers that allow broad comparisons among gymnosperm species. With few gymnosperm genomes available, recently obtained transcriptomes in gymnosperms are a great addition to identifying single-copy gene families as molecular markers for phylogenomic analysis in seed plants. Taking advantage of an increasing number of available genomes and transcriptomes, we identified single-copy genes in a broad collection of seed plants and used these to infer phylogenetic relationships between major seed plant taxa. This study aims at extending the current phylogenetic toolkit for seed plants, assessing its ability for resolving seed plant phylogeny, and discussing potential factors affecting phylogenetic reconstruction. In total, we identified 3,072 single-copy genes in 31 gymnosperms and 2,156 single-copy genes in 34 angiosperms. All studied seed plants shared 1,469 single-copy genes, which are generally involved in functions like DNA metabolism, cell cycle, and photosynthesis. A selected set of 106 single-copy genes provided good resolution for the seed plant phylogeny except for gnetophytes. Although some of our analyses support a sister relationship between gnetophytes and other gymnosperms, phylogenetic trees from concatenated alignments without 3rd codon positions and amino acid alignments under the CAT + GTR model, support gnetophytes as a sister group to Pinaceae. Our phylogenomic analyses demonstrate that, in general, single-copy genes can uncover both recent and deep divergences of seed plant phylogeny.</span>