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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