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Chromosome studies in the grass subfamily Chloridoideae. I. Basic chromosome numbers

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Abstract:

Two main basic chromosome numbers occur in the majority of southern African Chloridoideae, i.e., 9 and 10, the majority being x = 10. Two main evolutionary pathways, one following x = 10 and the other following an aneuploid/dysploid reduction to x = 9 are suggested for the subfamily. Evidence indicates that x = 9, 10 are paleopolyploid basic chromosome numbers, with x = 10 derived from x = 5. This corresponds to the closely related Panicoideae where five is accepted as the basic chromosome number.

Keywords: CHROMOSOME NUMBERS; EVOLUTION; POACEAE; SOUTHERN AFRICA

Document Type: Research Article

Affiliations: Department of Plant Sciences: Genetics (62), University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa.

Publication date: August 1, 2003

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