Analysis of transcriptome data in the red flour beetle, Tribolium castaneum

Department of Entomology, Kansas State University, Manhattan, KS 66506-4004, USA.
Insect Biochemistry and Molecular Biology (Impact Factor: 3.45). 05/2008; 38(4):380-6. DOI: 10.1016/j.ibmb.2007.09.008
Source: PubMed


The whole genome sequence of Tribolium castaneum, a worldwide coleopteran pest of stored products, has recently been determined. In order to facilitate accurate annotation and detailed functional analysis of this genome, we have compiled and analyzed all available expressed sequence tag (EST) data. The raw data consist of 61,228 ESTs, including 10,704 obtained from NCBI and an additional 50,524 derived from 32,544 clones generated in our laboratories. These sequences were amassed from cDNA libraries representing six different tissues or stages, namely: whole embryos, whole larvae, larval hindguts and Malpighian tubules, larval fat bodies and carcasses, adult ovaries, and adult heads. Assembly of the 61,228 sequences collapsed into 12,269 clusters (groups of overlapping ESTs representing single genes), of which 10,134 mapped onto 6,463 (39%) of the 16,422 GLEAN gene models (i.e. official Tribolium gene list). Approximately 1,600 clusters (13% of the total) lack corresponding GLEAN models, despite high matches to the genome, suggesting that a considerable number of transcribed sequences were missed by the gene prediction programs or were removed by GLEAN. We conservatively estimate that the current EST set represents more than 7,500 transcription units.

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    • "A number of physical adaptations has been found in this insect and these adaptations are not found in any other insect species such as Drosophila melanogaster, Anopheles gambiae and Apis mellifera. For example, Tribolium castaneum belongs to a group of insects that are dessication-resistant insects [7] Serotyping is important factor in distinguishing between the strains of bacteria that cause diseases in human. E. coli can cause infection in the brain stem and urinary tract infection and intestinal diseases. "

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    • "This study provides a first pass survey of genes found in Onthophagus. Prior to this study, Tribolium castaneum was the only species of beetle for which comprehensive sequence information was available [6,35]. Comparative analyses indicate that the gene repertoire of Tribolium is consistent with the general trends seen across sequenced insects and vertebrates [6,36]. "
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