TABLE 1

Assessment of the relative rate of genome rearrangement among insect mitochondrial genomes, using the RGR

Comparison AComparison BComparison C
Genome 1BP(1,3), BP(2,3)PGR(1,3), GR(2,3)PGR(1,3), GR(2,3)P
Orthoptera: Locusta 3, 00.0833 1, 00.3173 1, 20.5673
Hemiptera: Triatoma 0, 01.0000 0, 01.0000 0, 20.1573
Thysanoptera: Thrips30, 04 × 10−8***24, 09 × 10−7***24, 21 × 10−4***
Psocoptera: Lepidopsocid sp.15, 01 × 10−4*** 8, 00.0047* 8, 20.0578
Phthiraptera: Heterodoxus35, 03 × 10−9***31, 03 × 10−8***31, 24 × 10−7***
Coleoptera 0, 01.0000 0, 01.0000 0, 20.1573
Hymenoptera: Apis16, 01 × 10−4*** 8, 00.0047* 8, 20.0578
Lepidoptera 3, 00.0833 1, 00.3173 1, 20.5673
Diptera: Anopheles 5, 00.0253 2, 00.1573 2, 21.0000
  • For all comparisons, genomes 2 and 3 are Drosophila and Daphnia, respectively. However, in comparison C, the number of gene rearrangements between genomes 2 and 3 has been artificially inflated (from 0 to 2), to assess the impact of increasing branch lengths to the reference genomes. The tabulated P values are the uncorrected values; asterisks indicate the level of significance after Bonferroni corrections (*P < 0.05, **P < 0.01, ***P < 0.001). Where genome organization did not differ among members of an order [viz. Coleoptera (Crioceris, Pyrocoelia, and Tribolium) and Lepidoptera (Bombyx and Ostrinia)], only a single genome was assessed. Only Anopheles from the Diptera was assessed, as the genome organization of other dipterans (Cochliomyia, Chrysomya, and Ceratitis) does not differ from that of Drosophila.