Recovery of the mitochondrial COI barcode region in diverse Hexapoda through tRNA-based primers

BMC Genomics

Table 1 Mitochondrial gene arrangements upstream of the COI gene

Phylum	Subphylum	Mitochondrial gene arrangement^a	Arrangement identified^b
Arthropoda	Chelicerata	W,-C,-Y^c,d,e; W,-C,-Y,-Y; W,-C; W,-Y; W	33/41
	Crustacea	W,-C,-Y; W,-Q,-C (-Y); W,Y; W	29/39
	Hexapoda	W,-C,-Y; W,-Y; W,-C; W	120/126
	Myriapoda	W,-C; W, W,-Y; W,C,-Y	8/8
Chordata	Vertebrata	W,-A,-N,-C,-Y	60/60

^a, All gene arrangement data are from Mitome http://www.mitome.info/
^b, Proportion of taxa possessing one of the gene arrangements shown. For example, all 60 vertebrates share one gene order in which four other tRNA genes lie between tRNA-W and COI. By comparison 120 of 126 Hexapoda lineages possess one of four arrangements, none involving more than two intervening tRNA genes
^c, Dominant gene arrangement is shown in bold
^d, Reversed gene arrangements are represented as (-)
^e, Abbreviations for tRNA genes: W - Tryptophan, C- Cysteine, Y- Tyrosine, Q - Glutamine, N- Asparagine and A- Alanine

ISSN: 1471-2164