Phylogenetic reconstruction of all ecdysozoa based on nuclear genes, 18S and 28S ribosomal gene sequences, suggests that Branchiopod crustaceans are more closely related to Hexapoda than Malacostracan crustaceans. Mitochondrial genome similarity suggests that Branchiopoda and Malacostraca represent monophyletic sister groups with the closest relatedness to Hexapoda. Phylogenetic reconstructions of arthropods based on nuclear markers, mitochondrial markers, and whole mitochondrial genome sequences suggest that Daphnia are most closely allied with Malacostracan crustaceans (crabs, shrimp, lobsters) and Hexapoda (insects) –. The closest phylogenetic comparison taxa available for Daphnia are insects that have had their genomes sequenced. For example, comparative genomic studies in vertebrate animals are possible between multiple mammal, bird and fish species that have had their genomes sequenced. Comparative genomics approaches to addressing basic questions in biology require appropriate phylogenetic position of comparison taxa. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Ĭompeting interests: The authors have declared that no competing interests exist.Ī recent addition to the set of model organisms for biomedical research was the Branchiopod crustacean Daphnia pulex, whose genome sequencing project has made this organism ideal for studies of both ecotoxicogenomics as well as systems biology –. DE-AC02-05CH11231 and Los Alamos National Laboratory under Contract No. W-7405- Eng-48, Lawrence Berkeley National Laboratory under Contract No. ( ), and DNA sequencing was performed as a part of a 2006 Community Sequencing Project ( ), under the auspices of the US Department of Energy's Office of Science, Biological, and Environmental Research Program, and by the University of California, Lawrence Livermore National Laboratory under Contract No. ( ), a San Francisco State University Presidential Mini-Grant to J.H.S. ( ), a San Francisco State University Center for Computing in the Life Sciences Mini-Grant to J.H.S. This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.įunding: This work was supported by National Science Foundation NSF-IOB 0533920 to J.H.S. Received: JAccepted: JanuPublished: February 19, 2010 Brahmachari, Institute of Genomics and Integrative Biology, India

(2010) The Porcelain Crab Transcriptome and PCAD, the Porcelain Crab Microarray and Sequence Database. Citation: Tagmount A, Wang M, Lindquist E, Tanaka Y, Teranishi KS, Sunagawa S, et al.

Pcad 2006 Library