Table 2 Summary of mitochondrial intron distribution, and origin and mobility hypotheses
A Mitochondrial intron distribution in fungal strains and percentage of nucleotide identity between orthologous sequences | ||||||||
Intron | Presence | |||||||
InF. tricinctumcladea | InF. avenaceumcladea | In FTSC | In FSAMSC | In FOSC | In FFSC | In FSSC | In distant Ascomycota | |
cox2 i1 | all | all but INRA 612 | optional | Fcul, Fven, Fgra(95.7–96.2%) | 0 | 0 | 0 | N. cinnabarina(84.2%) |
nad4L iFave1 | 0 | all | optional | Fcul, Fven(91.7–96.9%) | 0 | 0 | 0 | T. asperellum(97.7%);H. minnesotensis(81.7%) |
nad5 iFtri1 | all | 2 (INRA6, INRA 612) | optional | 0 | 0 | 0 | 0 | Pleosporineae sub-order (84.1–85.6%) |
cob i1 | 5 strains (clade B) | all | optional | Fven(97.9%),Fgra, Fger(89.7%) | severalFoxy f.sp. | 0 | 0 | B. bassiana(81.9%) |
cox1 iFave1 | only INRA86 | all | optional | Fcul, Fven, Fgra, Fger(94.5%) | 0 | Fman (95.1%), Ftem(93,7%) | 0 | E. typhina(84.2%) |
cox1 iFtri1 | all | 0 | optional | Fcul, Fven, Fgra, Fger(80.6%) | 0 | 0 | Fsol(94.4%) | A. aegerita(85.4%); Basidiomycota |
cox1 i2 | all | all | all | Fcul, Fven, Fgra, Fger(77.7%) | 0 | Fver, Ftem, Fcir(77.2%) | Fsol(93.0%) | 0 |
cox1 i3 | all | all | all | Fcul, Fven, Fgra, Fger(66.5%) | 0 | Ftem, Fcir(66.5%) | Fsol(96.0%) | Atub(86.6%) |
cox1 i4 | all | all | all | Fcul, Fven, Fgra, Fger(96.5%) | 0 | Ftem, Fcir(74.5%) | 0 | 0 |
B Origin and mobility hypotheses for mitochondrial introns | ||||||||
Intron | Mobility (presence inFusariumgenus) | Origin hypothesis | Lateral transfer | |||||
cox2 i1 | Yes (lost in INRA 612) | ancestral (inFusariumgenus) | unknown | |||||
nad4L iFave1 | Yes (frequent loss) | ancestral (inFusariumgenus) | Yes (recent transfer withTasp) | |||||
nad5 iFtri1 | yes (rare intron; frequent loss) | ancestral (in FTSC) | unknown | |||||
cob i1 | Yes (loss in oneFtriclade) | ancestral (inFusariumgenus) | Yes (recent transfer withFven) | |||||
cox1 iFave1 | Yes (loss and gain) | ancestral (inFusariumgenus) | Yes (recent transfer withFman) | |||||
cox1 iFtri1 | Yes (loss inFave) | ancestral (inFusariumgenus) | Yes (recent transfer withFsol) | |||||
cox1 i2 | Yes (loss and gain inFusariumgenus) | ancestral (inFusariumgenus) | Yes (recent transfer withFsol) | |||||
cox1 i3 | Yes (loss and gain inFusariumgenus) | ancestral (inFusariumgenus) | Yes (recent transfer withAtub) | |||||
cox1 i4 | Yes (loss and gain inFusariumgenus) | ancestral (inFusariumgenus) | unknown | |||||