Genome Sequencing of the Phytoseiid Predatory Mite Metaseiulus occidentalis Reveals Completely Atomized Hox Genes and Superdynamic Intron Evolution.

Détails

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Etat: Serval
Version: Final published version
ID Serval
serval:BIB_3E378A9BBF46
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genome Sequencing of the Phytoseiid Predatory Mite Metaseiulus occidentalis Reveals Completely Atomized Hox Genes and Superdynamic Intron Evolution.
Périodique
Genome Biology and Evolution
Auteur(s)
Hoy M.A., Waterhouse R.M., Wu K., Estep A.S., Ioannidis P., Palmer W.J., Pomerantz A.F., Simão F.A., Thomas J., Jiggins F.M., Murphy T.D., Pritham E.J., Robertson H.M., Zdobnov E.M., Gibbs R.A., Richards S.
ISSN
1759-6653 (Electronic)
ISSN-L
1759-6653
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
8
Numéro
6
Pages
1762-1775
Langue
anglais
Résumé
Metaseiulus occidentalis is an eyeless phytoseiid predatory mite employed for the biological control of agricultural pests including spider mites. Despite appearances, these predator and prey mites are separated by some 400 Myr of evolution and radically different lifestyles. We present a 152-Mb draft assembly of the M. occidentalis genome: Larger than that of its favored prey, Tetranychus urticae, but considerably smaller than those of many other chelicerates, enabling an extremely contiguous and complete assembly to be built-the best arachnid to date. Aided by transcriptome data, genome annotation cataloged 18,338 protein-coding genes and identified large numbers of Helitron transposable elements. Comparisons with other arthropods revealed a particularly dynamic and turbulent genomic evolutionary history. Its genes exhibit elevated molecular evolution, with strikingly high numbers of intron gains and losses, in stark contrast to the deer tick Ixodes scapularis Uniquely among examined arthropods, this predatory mite's Hox genes are completely atomized, dispersed across the genome, and it encodes five copies of the normally single-copy RNA processing Dicer-2 gene. Examining gene families linked to characteristic biological traits of this tiny predator provides initial insights into processes of sex determination, development, immune defense, and how it detects, disables, and digests its prey. As the first reference genome for the Phytoseiidae, and for any species with the rare sex determination system of parahaploidy, the genome of the western orchard predatory mite improves genomic sampling of chelicerates and provides invaluable new resources for functional genomic analyses of this family of agriculturally important mites.

Mots-clé
Acari/genetics, Animals, Genes, Homeobox/genetics, Genome, Genomics, High-Throughput Nucleotide Sequencing, Introns/genetics, Pest Control, Biological, Tetranychidae/genetics, Transcriptome/genetics, Dicer-2 gene duplication, Helitron rolling-circle transposons, Metaseiulus Typhlodromus Galendromus occidentalis, genome assembly, parahaploid sex determination, western orchard predatory mite
Pubmed
Web of science
Open Access
Oui
Création de la notice
20/09/2017 9:55
Dernière modification de la notice
08/05/2019 17:29
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