Strain selection and genetic variation in <i>Gracilaria chilensis</i> (Gracilariales, Rhodophyta)

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dc.contributor.authorMeneses, I
dc.contributor.authorSantelices, B
dc.date.accessioned2025-01-21T01:32:19Z
dc.date.available2025-01-21T01:32:19Z
dc.date.issued1999
dc.description.abstractStrain selection processes in seaweed often have assumed that sterile clones could be maintained for long periods in a diversity of environments without major genetic changes. However, clonal species such as Gracilaria chilensis exhibit intra-clonal variation in performance and ongoing studies suggest such changes may be due to rapid changes in DNA composition associated with growth, via mitotic recombinations. Therefore performance of a given ramet in this type of seaweed should be understood as the dynamic outcome of rapid reactions between the environment and the changing genotype of the selected strain. To evaluate this idea, we measured changes in genetic variability, as detected by DNA-fragment polymorphism using RAPDs-PCR, exhibited by clones of G. chilensis after two transfers to different environmental conditions (from field to controlled laboratory conditions and from the laboratory to large-scale tank culture). The transfer to laboratory conditions reduced the frequency of low similarity values and increased the frequency of intermediate similarity values in DNA banding patterns, suggesting the branchlets produced under controlled laboratory conditions have less genetic variability (evaluated as total DNA polymorphism) than plants recently collected in the field. Tank incubation reduced the total range of similarity and significantly increased the frequency of high similarity values. Results thus suggest the dynamic of genetic changes in vegetative clones of Gracilaria chilensis that is fast and strongly affected by the external environment.
dc.fuente.origenWOS
dc.identifier.issn0921-8971
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97242
dc.identifier.wosidWOS:000082795600002
dc.issue.numero3
dc.language.isoen
dc.pagina.final246
dc.pagina.inicio241
dc.revistaJournal of applied phycology
dc.rightsacceso restringido
dc.subjectDNA polymorphism
dc.subjectGracilaria chilensis
dc.subjectgenetic variability
dc.subjectstrain selection
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.ods14 Life Below Water
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa14 Vida submarina
dc.titleStrain selection and genetic variation in <i>Gracilaria chilensis</i> (Gracilariales, Rhodophyta)
dc.typeartículo
dc.volumen11
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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