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      Greater past disparity and diversity hints at ancient migrations of European honey bee lineages into Africa and Asia

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      Journal of Biogeography
      Wiley-Blackwell

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          Insights into social insects from the genome of the honeybee Apis mellifera.

          Here we report the genome sequence of the honeybee Apis mellifera, a key model for social behaviour and essential to global ecology through pollination. Compared with other sequenced insect genomes, the A. mellifera genome has high A+T and CpG contents, lacks major transposon families, evolves more slowly, and is more similar to vertebrates for circadian rhythm, RNA interference and DNA methylation genes, among others. Furthermore, A. mellifera has fewer genes for innate immunity, detoxification enzymes, cuticle-forming proteins and gustatory receptors, more genes for odorant receptors, and novel genes for nectar and pollen utilization, consistent with its ecology and social organization. Compared to Drosophila, genes in early developmental pathways differ in Apis, whereas similarities exist for functions that differ markedly, such as sex determination, brain function and behaviour. Population genetics suggests a novel African origin for the species A. mellifera and insights into whether Africanized bees spread throughout the New World via hybridization or displacement.
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            A MONOGRAPH OF THE BALTIC AMBER BEES AND EVOLUTION OF THE APOIDEA (HYMENOPTERA)

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              The age of the Sahara desert.

              In the Sahara region, the age of onset of the desert condition has been uncertain until now. Here we report on the discovery of 7,000,000-year-old eolian dune deposits from the northern Chad Basin. This geological archive is the oldest known evidence for desert occurrence in the Sahara.
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                Author and article information

                Journal
                Journal of Biogeography
                J. Biogeogr.
                Wiley-Blackwell
                03050270
                June 2013
                June 20 2013
                :
                :
                : n/a
                Article
                10.1111/jbi.12151
                4438f561-07c1-4f6d-b185-8e9dca735ccf
                © 2013

                http://doi.wiley.com/10.1002/tdm_license_1.1

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