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Title: Isozymes in macroalgae (seaweeds): Genetic differentiation, genetic variability and applications in systematics
Authors: Sosa, Pedro 
Lindstrom, Sandra
UNESCO Clasification: 241714 Genética vegetal
240903 Genética de poblaciones
Keywords: Allozymes
Genetic identity
Genetic structure
Genetic variability, et al
Issue Date: 1999
Publisher: 0967-0262
Journal: European Journal of Phycology 
Abstract: Use of isozymes (including allozymes) in studies of population genetics and systematics of seaweeds has increased sufficiently in the last decade to allow some generalization. Only a single locus has been observed for about half the enzymes analysed in seaweeds, compared with 29% in vascular plants. Compared with higher plants, macroalgal species generally have low amounts of electrophoretically detectable genetic variation; the lowest levels of genetic variation found in natural populations are those reported for seaweeds. Nonetheless, seaweeds show an association between levels of genetic diversity as revealed by isozymes and species-specific attributes, such as mating system and predominance of asexual versus sexual reproduction. In systematic studies, isozymes have revealed cryptic species and identified pairs of sibling taxa. The quaternary structure of enzymes appears to be conserved at the phylum level. With the current availability of improved techniques for enzyme electrophoresis and for data interpretation, we expect future studies utilizing isozyme electrophoresis to provide further insight into population and evolutionary processes in seaweeds.
ISSN: 0967-0262
DOI: 10.1080/09541449910001718791
Source: European Journal of Phycology [ISSN 0967-0262], v. 34, p. 427-442
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