Table 2. Differences between essential and dispensable chromosomes in the genome of Mycosphaerella graminicola isolate IPO323.
| Chromosomes | |||
| Statistic | Core (1–13) | Dispensable (14–21) | Combined (1–21) |
| Size in bp | |||
| Total | 35,077,646 | 4,608,605 | 39,686,251 |
| Mean | 2,698,280 | 576,076*** | 1,889,821 |
| Percent | 88.4 | 11.6 | 100.0 |
| All genes | |||
| Total | 10,279 | 654 | 10,933 |
| Mean | 790.7 | 81.8*** | 521 |
| Percent of total | 94.0 | 6.0 | 100.0 |
| Unique genesa | |||
| Total | 5,479 | 311 | 5,790 |
| Mean | 421.5 | 38.9*** | 276 |
| Percent of all | 53.3 | 47.6 | 53.0 |
| Annotated genes | |||
| Total | 6,046 | 65 | 6,111 |
| Mean | 465.1 | 8.1*** | 291.0 |
| Percent of all | 58.8 | 9.9 | 55.9 |
| Unique total | 2,308 | 18 | 2,326 |
| Unique mean | 177.5 | 2.3*** | 110.8 |
| Transcript size, mean in bp | 1327.1 | 847.3*** | 1144.3 |
| Gene density, Mb−1 | 288.9 | 142.4*** | 233.1 |
| Repetitive DNA, mean | 15.9% | 30.0%*** | 21.2% |
| G+C, mean | 52.3% | 50.9%** | 51.7% |
a
At a BLAST cutoff value of 1×e−20.
***The mean for the dispensable chromosomes is significantly different from that for the essential chromosomes at P<0.001 by one-tailed t test.
**The mean for the dispensable chromosomes is significantly different from that for the essential chromosomes at P = 0.012 by one-tailed t test.