Mates Matter: Gametophyte Kinship Recognition and Inbreeding in the Giant Kelp, <i>Macrocystis</i> <i>pyrifera</i> (Laminariales, Phaeophyceae)

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dc.contributor.authorCamus, Carolina
dc.contributor.authorSolas, Maribel
dc.contributor.authorMartinez, Camila
dc.contributor.authorVargas, Jaime
dc.contributor.authorGarces, Cristobal
dc.contributor.authorGil-Kodaka, Patricia
dc.contributor.authorLadah, Lydia B.
dc.contributor.authorSerrao, Ester A.
dc.contributor.authorFaugeron, Sylvain
dc.date.accessioned2025-01-20T23:53:22Z
dc.date.available2025-01-20T23:53:22Z
dc.date.issued2021
dc.description.abstractInbreeding, the mating between genetically related individuals, often results in reduced survival and fecundity of offspring, relative to outcrossing. Yet, high inbreeding rates are commonly observed in seaweeds, suggesting compensatory reproductive traits may affect the costs and benefits of the mating system. We experimentally manipulated inbreeding levels in controlled crossing experiments, using gametophytes from 19 populations of Macrocystis pyrifera along its Eastern Pacific coastal distribution (EPC). The objective was to investigate the effects of male-female kinship on female fecundity and fertility, to estimate inbreeding depression in the F1 progeny, and to assess the variability of these effects among different regions and habitats of the EPC. Results revealed that the presence and kinship of males had a significant effect on fecundity and fertility of female gametophytes. Females left alone or in the presence of sibling males express the highest gametophyte size, number, and size of oogonia, suggesting they were able to sense the presence and the identity of their mates before gamete contact. The opposite trend was observed for the production of embryos per female gametes, indicating higher costs of selfing and parthenogenesis than outcrossing on fertility. However, the increased fecundity compensated for the reduced fertility, leading to a stable overall reproductive output. Inbreeding also affected morphological traits of juvenile sporophytes, but not their heatwave tolerance. The male-female kinship effect was stronger in high-latitude populations, suggesting that females from low-latitude marginal populations might have evolved to mate with any male gamete to guarantee reproductive success.
dc.fuente.origenWOS
dc.identifier.doi10.1111/jpy.13146
dc.identifier.eissn1529-8817
dc.identifier.issn0022-3646
dc.identifier.urihttps://doi.org/10.1111/jpy.13146
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94958
dc.identifier.wosidWOS:000627556700001
dc.issue.numero3
dc.language.isoen
dc.pagina.final725
dc.pagina.inicio711
dc.revistaJournal of phycology
dc.rightsacceso restringido
dc.subjectcontrolled crossing experiment
dc.subjectfecundity
dc.subjectfertility
dc.subjectparthenogenesis
dc.subjectreproductive assurance
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleMates Matter: Gametophyte Kinship Recognition and Inbreeding in the Giant Kelp, <i>Macrocystis</i> <i>pyrifera</i> (Laminariales, Phaeophyceae)
dc.typeartículo
dc.volumen57
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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