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.

Roa and Guerra

Roa and Guerra BMC Evolutionary Biology 2012 12:225   doi:10.1186/1471-2148-12-225

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