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Plant Systematics and Evolution

, Volume 172, Issue 1–4, pp 263–271 | Cite as

Robertsonian change in allies ofZebrina (Commelinaceae)

  • K. Jones
Article

Abstract

Meiotic pairing inTradescantia soconuscana 2n=26 (6M+16A+4T) suggests that it has a tetraploid constitution which is not apparent in its chromosome number. Its “nombre fondamental” of 32 indicates that it could have evolved from an ancestor with x=8 by a combination of Robertsonian fusion, hybridization and polyploidy. The 2n=16 (8A+8T) karyotype of a closely related diploid supports this. The allied genusZebrina may have followed a similar method of chromosome evolution.

Key words

Angiosperms Commelinaceae Tradescantia soconuscana Zebrina Chromosome evolution Robertsonian change 

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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • K. Jones
    • 1
  1. 1.Jodrell LaboratoryRoyal Botanic GardensKew, Richmond, SurreyEngland

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