A novel mitochondrial genome architecture in thrips (Insecta: Thysanoptera): extreme size asymmetry among chromosomes and possible recent control region duplication

• DOI: 10.1186/s12864-015-1672-4
• Publication Date: 2015-06-11T00:59:28Z
• Authors: Aaron M. Dickey; Vivek Kumar; J. Kent Morgan; Antonella Jara-Ca...; Robert G. Shatters; Cindy L. McKenzie; Lance S. Osborne
• Keywords: 0301 basic medicine; Thysanoptera; Sequence Analysis, DNA; DNA, Mitochondrial; Chromosomes; Evolution, Molecular; 03 medical and health sciences; Genome Size; Gene Duplication; Genetics; Animals; Biotechnology; Research Article

Multipartite mitochondrial genomes are very rare in animals but have been found previously two insect orders with highly rearranged genomes, the Phthiraptera (parasitic lice), and Psocoptera (booklice/barklice). We provide first report of a multipartite genome architecture third order genomes: Thysanoptera (thrips). sequenced complete divergent members Scirtothrips dorsalis cryptic species complex. The East Asia 1 has single circular chromosome common to while South consisting chromosomes. fragmented exhibits extreme size asymmetry majority genes on large, 14.28 kb, only nad6 trnC 0.92 kb mini-circle chromosome. This also features paralogous control regions high similarity suggesting recent origin species. Thysanoptera, along other minor paraenopteran should be considered models for rapid evolution, including fragmentation. Continued use these will facilitate greater understanding recombination evolutionary processes across eukaryotes.