SEX RATIO VARIATION IN THE LESSONIA NIGRESCENS COMPLEX (LAMINARIALES, PHAEOPHYCEAE): EFFECT OF LATITUDE, TEMPERATURE, AND MARGINALITY

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dc.contributor.authorOppliger, Luz Valeria
dc.contributor.authorCorrea, Juan A.
dc.contributor.authorFaugeron, Sylvain
dc.contributor.authorBeltran, Jessica
dc.contributor.authorTellier, Florence
dc.contributor.authorValero, Myriam
dc.contributor.authorDestombe, Christophe
dc.date.accessioned2024-01-10T12:08:31Z
dc.date.available2024-01-10T12:08:31Z
dc.date.issued2011
dc.description.abstractLittle is known about variation of sex ratio, the proportion of males to females, in natural populations of seaweed, though it is a major determinant of the mating system. The observation of sexual chromosomes in kelps suggested that sex is partly genetically determined. However, it is probably not purely genetic since the sex ratio can be modified by environmental factors such as salinity or temperature. In this paper, sex ratio variation was studied in the kelp Lessonia nigrescens Bory complex, recently identified as two cryptic species occurring along the Chilean coast: one located north and the other south of the biogeographic boundary at latitude 29 degrees-30 degrees S. The life cycle of L. nigrescens is characterized by an alternation of microscopic haploid gametophytic individuals and large macroscopic fronds of diploid sporophytes. The sex ratio was recorded in progenies from 241 sporophytic individuals collected from 13 populations distributed along the Chilean coast in order (i) to examine the effect of an environmental gradient coupled with latitude, and (ii) to compare marginal populations to central populations of the two species. In addition, we tested the hypothesis that the sex ratios of the two cryptic species would be affected differently by temperature. First, our results demonstrate that sex ratio seems to be mainly genetically determined and temperature can significantly modify it. Populations of the northern species showed a lower frequency of males at 14 degrees C than at 10 degrees C, whereas populations of the southern species showed the opposite pattern. Second, both species displayed an increased variation in sex ratio at the range limits. This greater variation at the margins could be due either to differential mortality between sexes or to geographic parthenogenesis (asexual reproduction).
dc.description.funderCONICYT-FRENCH EMBASSY
dc.description.funderMinistry of Education and Research (MENRT)
dc.description.funderFrench Ministry of Foreign Affairs
dc.description.funderLaboratoire International Associe "Dispersal and Adaptation of Marine Species (LIA DIAMS)
dc.fechaingreso.objetodigital2024-05-14
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1529-8817.2010.00930.x
dc.identifier.eissn1529-8817
dc.identifier.issn0022-3646
dc.identifier.urihttps://doi.org/10.1111/j.1529-8817.2010.00930.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76401
dc.identifier.wosidWOS:000287492700002
dc.information.autorucCiencias Biológicas;Beltran J;S/I;104027
dc.information.autorucCiencias Biológicas;Correa J ;S/I;54626
dc.information.autorucCiencias Biológicas;Faugeron S ;S/I;136754
dc.information.autorucCiencias Biológicas;Oppliger LV ;S/I;121560
dc.information.autorucCiencias Biológicas;Tellier F ;S/I;165756
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final12
dc.pagina.inicio5
dc.publisherWILEY
dc.revistaJOURNAL OF PHYCOLOGY
dc.rightsacceso restringido
dc.subjectcryptic species
dc.subjectgametophyte
dc.subjectlatitude
dc.subjectLessonia nigrescens
dc.subjectmarginal populations
dc.subjectPhaeophyceae
dc.subjectsex determination
dc.subjectsex ratio
dc.subjecttemperature
dc.subjectBROWN ALGA
dc.subjectGENETIC DIVERSITY
dc.subjectEVOLUTION
dc.subjectGAMETOPHYTES
dc.subjectPOLYMORPHISM
dc.subjectCHROMOSOME
dc.subjectEQUISETUM
dc.subjectCULTURE
dc.subjectRANGES
dc.subjectLIGHT
dc.subject.ods15 Life on Land
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.titleSEX RATIO VARIATION IN THE LESSONIA NIGRESCENS COMPLEX (LAMINARIALES, PHAEOPHYCEAE): EFFECT OF LATITUDE, TEMPERATURE, AND MARGINALITY
dc.typeartículo
dc.volumen47
sipa.codpersvinculados104027
sipa.codpersvinculados54626
sipa.codpersvinculados136754
sipa.codpersvinculados121560
sipa.codpersvinculados165756
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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