Andrew J Mongue, Amanda Markee, Ethan Grebler, Tracy Liesenfelt, Erin C Powell
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Genome report: Genome sequence of tuliptree scale, Toumeyella liriodendri (Gmelin), an ornamental pest insect.
Scale insects are of interest both to basic researchers for their unique reproductive biology and to applied researchers for their pest status. In spite of this interest, there remain few genomic resources for this group of insects. To begin addressing this lack of data, we present the genome sequence of tuliptree scale, Toumeyella liriodendri (Gmelin) (Hemiptera: Coccomorpha: Coccidae). The genome assembly spans 536Mb, with over 96% of sequence assembled into one of 17 chromosomal scaffolds. We characterize roughly 66% of this sequence as repetitive and annotate 16,508 protein coding genes. Then we use the reference genome to explore the phylogeny of soft scales (Coccidae) and evolution of karyotype within the family. We find that T. liriodendri is an early-diverging soft scale, less closely related to most sequenced soft scales than a species of the family Aclerdidae is. This molecular result corroborates a previous, morphology-based phylogenetic placement of Aclerdidae within Coccidae. In terms of genome structure, T. liriodendri has nearly twice as many chromosomes as the only other soft scale assembled to the chromosome level, Ericerus pela (Chavannes). In comparing the two, we find that chromosome number evolution can largely be explained by simple fissions rather than more complex rearrangements. These genomic natural history observations lay a foundation for further exploration of this unique group of insects.
期刊介绍:
G3: Genes, Genomes, Genetics provides a forum for the publication of high‐quality foundational research, particularly research that generates useful genetic and genomic information such as genome maps, single gene studies, genome‐wide association and QTL studies, as well as genome reports, mutant screens, and advances in methods and technology. The Editorial Board of G3 believes that rapid dissemination of these data is the necessary foundation for analysis that leads to mechanistic insights.
G3, published by the Genetics Society of America, meets the critical and growing need of the genetics community for rapid review and publication of important results in all areas of genetics. G3 offers the opportunity to publish the puzzling finding or to present unpublished results that may not have been submitted for review and publication due to a perceived lack of a potential high-impact finding. G3 has earned the DOAJ Seal, which is a mark of certification for open access journals, awarded by DOAJ to journals that achieve a high level of openness, adhere to Best Practice and high publishing standards.