Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/50037
Title: Genetic Variability of Gelidium Canariensis (Rhodophyta) Determined by Isozyme Electrophoresis
Authors: Sosa, Pedro A. 
Garcia-Blairsy Reina, Guillermo 
UNESCO Clasification: 241719 Fisiología vegetal
241707 Algología (ficología)
Keywords: Canary Islands
Electrophoresis
Founder effect
Gelidium canariensis
Genetic variability, et al
Issue Date: 1993
Publisher: 0022-3646
Journal: Journal of Phycology 
Abstract: The populations of Gelidium canariensis (Grunow) Seoane‐Camba from the Canary Islands were analyzed for genetic variability by isozyme electrophoresis in 1989 and 1990. Each population was divided into sporophytic and gametophytic subpopulations. Twenty‐three to 27 putative alleles corresponding to 22 gene loci were analyzed. Sev‐enteen loci were monomorphic in all six subpopulations, and five were polymorphic in at least one subpopulation. Significant deviations from Hardy‐Weinberg equilibrium were found. The amount of genetic variability (percentage of polymorphic loci, mean number of alleles per locus, and average gene diversity) of haploid subpopulations was lower than that of diploid subpopulations. No correlation between genetic distance and geographical distance was found. Low genetic differentiation between sporophytic and gametophytic subpopulations of the same locality was obsewed in two populations. The low genetic diversity and genetic differentiation suggest that the genetic structure of the populations of G. canariensis from the Canary Islands is due to a combination of founder effects and the predominance of asexual reproduction. Initial differences in gene frequencies may have persisted because of insufficient time to reach a higher level of differentiation.
URI: http://hdl.handle.net/10553/50037
ISSN: 0022-3646
DOI: 10.1111/j.1529-8817.1993.tb00289.x
Source: Journal of Phycology [ISSN 0022-3646], v. 29, p. 118-124
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