Table 3.
Occurrence of gene blocks in the five proposed gene order patterns
| Gene block/ Pattern | cox1-T-rrnL | rrnL-C-rrnS | cox2-E-nad6 | atp6-nad2-V-A-D-nad1 | nad1-N-P-I-K-nad3 |
|---|---|---|---|---|---|
| Pattern 1a | Ya | Y | P | Yb | Yc |
| Pattern 1b | Y | – | Y | – | – |
| Pattern 2 | Y | Y | – | – | – |
| Pattern 3 | – | – | – | Y | – |
| Pattern 4 | Y | Y | Y | – | Y |
Notes: “Y” indicates that a gene block occurs in the corresponding pattern, whereas “–” indicates that the a gene block is broken up. “P” indicates that the gene block is present in all species exhibiting the pattern 1a, except for trematodes. “Y” with a superscript letter indicates the existence of minor exceptions in the gene block, wherein “Ya” denotes Benedenia seriolae; “Yb” denotes Trichobilharzia regenti, Schistosoma mekongi and Schistosoma japonicum; and “Yd” denotes Brachycladium goliath