Table 1.
Number of rDNA sites per somatic chromosome complement (2n) in species of angiosperms and gymnosperms
|
Angiosperms |
Gymnosperms |
Total |
|
---|---|---|---|---|
Monocentrics | Holokinetics | |||
Number of karyotypes |
856 |
63 |
65 |
984 |
Mean of sites (s.d.) |
5.1 (3.6) |
6.6 (6.6) |
10.4 (7.1) |
5.5 (4.4) |
Median |
4 |
4 |
10 |
4 |
Mode |
2 |
4 |
2 |
4 |
Range |
2 - 32 |
2 - 45 |
2 - 34 |
2 – 45 |
Karyotypes with single site* | 265 (31.0%) | 6 (9.5%) | 11 (16.9%) | 282 (28.7%) |
* Karyotypes with a single pair of sites.