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- Title
Contributions to the Cytotaxonomy of the Commelinaceae. Gibasis linearis and its allies.
- Authors
JONES, KEITH; BHATTARAI, SUSHILA; HUNT, DAVID R.
- Abstract
Species of the Gibasis linearis alliance collected in Mexico in 1976 are shown to have a chromosome constitution of x = 6, but x = 5 has also been found in some populations of G. rhodantha and G. speciosa. These two basic numbers are associated with distinctive karyotypes, 2M + 4A and 3M + 2A respectively, which show a Robertsonian relationship with each other. The existence of 2n = 22 in G. speciosa, combining both basic numbers at the amphidiploid level provides evidence of pairing between metacentrics and acrocentrics in such a way as to substantiate the view that fusion or fission of chromosomes is responsible for the modification of basic number. This survey provides a basis for other studies which will determine the chromosome relationships of the species irrespective of chromosome number in this family.
- Publication
Botanical Journal of the Linnean Society, 1981, Vol 83, Issue 2, p141
- ISSN
0024-4074
- Publication type
Article
- DOI
10.1111/j.1095-8339.1981.tb01226.x