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Table 1 Number of rDNA sites per somatic chromosome complement (2n) in species of angiosperms and gymnosperms

From: Distribution of 45S rDNA sites in chromosomes of plants: Structural and evolutionary implications

 

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%)

  1. * Karyotypes with a single pair of sites.
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BMC Ecology and Evolution

ISSN: 2730-7182

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