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Table 1 Summary of cytogenetic analysis by rDNA-FISH.

From: Repeated reunions and splits feature the highly dynamic evolution of 5S and 35S ribosomal RNA genes (rDNA) in the Asteraceae family

Species1

Tribe

2n

Ploidy level

Linked2 35S-5S loci

Unlinked2 5S loci

Unlinked2 35S loci

Artemisia absinthium

Anthemideae

18

2

2

0

0

Artemisia tridentata

Anthemideae

18

2

3

0

0

Aster alpinus

Astereae

18

2

0

2

1

Calendula officinalis

Calenduleae

28

nd3

0

1

2

Dahlia pinnata

Heliantheae alliance

64

4

0

2

5

Chrysanthemum zawadskii

Anthemideae

54

6

0

3

5

Coreopsis major

Heliantheae alliance

24

2

3

(1)4

0

Helianthus annus

Heliantheae alliance

34

2

0

3

2

Helichrysum bracteatum

Gnaphalieae

22

nd3

2

0

0

Tagetes patula

Heliantheae alliance

48

4

7

0

0

Tripleurospermum maritimum

Anthemideae

36

4

4

0

0

  1. 1 for A. Absinthium and A. tridentata the data were taken from [8]; the remaining species were analysed in this work (Figures 7, 8).
  2. 2 number of sites per haploid set
  3. 3 not determined
  4. 4 minute 5S locus apparently devoid of 35S genes