Original Research

Chromosome studies on African plants. 9. Chromosome numbers in Ehrharta (Poaceae: Ehrharteae)

J. J. Spies, E. J. L. Saayman, S. P. Voges, G. Davidse
Bothalia | Vol 19, No 1 | a948 | DOI: https://doi.org/10.4102/abc.v19i1.948 | © 1989 J. J. Spies, E. J. L. Saayman, S. P. Voges, G. Davidse | This work is licensed under CC Attribution 4.0
Submitted: 18 October 1989 | Published: 18 October 1989

About the author(s)

J. J. Spies, Botanical Research Institute. Department of Agriculture and Water Supply, South Africa
E. J. L. Saayman, Botanical Research Institute. Department of Agriculture and Water Supply, South Africa
S. P. Voges, Current address: Biotechnological Research Centre, South Africa
G. Davidse, Missouri Botanical Garden,, United States

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Abstract

Cytogenetic studies of 53 specimens of 14 species of the genus  Ehrharta Thunb. confirmed a basic chromosome number of 12 for the genus. Chromosome numbers for 13 species are described for the first time. The highest ploidy level yet observed in the genus (2n = lOx = 120) is reported for E. villosa var.  villosa. B chromosomes were observed in several specimens of four different species.

Keywords

aneuploidy; chromosome numbers; Ehrharta. meiosis; polyploidy; southern Africa; winter rainfall area

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