Original Research
Basic chromosome numbers and polyploid levels in some South African and Australian grasses (Poaceae)
Submitted: 15 October 1991 | Published: 15 October 1991
About the author(s)
J. J. Spies, Department of Botany and Genetics. University of the Orange Free State, South AfricaE. van der Merwe, Grassland Research Centre, South Africa
H. du Plessis, National Botanical Institute., South Africa
E. J. L. Saayman, National Botanical Institute, South Africa
Full Text:
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Chromosome numbers of 46 specimens of grasses, involving 24 taxa from South Africa and Australia, have been determined during the present study. For the first time chromosome numbers are given for Eragrostis sarmentosa (Thunb.) Trin. (n = 20). Panicum aequinerve Nees (n = 18), Digitaria argyrograpta (Nees) Stapf (n = 9) and D. maitlandii Stapf & C.E. Hubb. (n = 9). Additional polyploid levels are described for Diplachne fusca (L.) Beauv. ex Roem. & Schult. (n = 10) and Digitaria diagonalis (Nees) Stapf var. diagonalis (n = 9).
B-chromosomes were observed in several different specimens. The presence of B-chromosomes often results in abnormal chromosomal behaviour during meiosis.
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