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dc.contributor.authorTurchetto, Carolinept_BR
dc.contributor.authorLima, Jacqueline de Souzapt_BR
dc.contributor.authorRodrigues, Daniele Munaretopt_BR
dc.contributor.authorBonatto, Sandro Luispt_BR
dc.contributor.authorFreitas, Loreta Brandão dept_BR
dc.date.accessioned2015-08-20T02:33:03Zpt_BR
dc.date.issued2015pt_BR
dc.identifier.issn0305-7364pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/122621pt_BR
dc.description.abstractBackground and Aims The evolution of selfing is one of the most common transitions in flowering plants, and this change in mating pattern has important systematic and ecological consequences because it often initiates reproductive isolation and speciation. Petunia axillaris (Solanaceae) includes three allopatric subspecies widely distributed in temperate South America that present different degrees of self-compatibity and incompatibility. One of these subspecies is co-distributed with P. exserta in a restricted area and presents a complex, not well-understood mating system. Artificial crossing experiments suggest a complex system of mating in this sympatric area. The main aims of this study were to estimate the pollen dispersal distance and to evaluate the breeding structure of P. axillaris subsp. axillaris, a hawkmoth-pollinated taxon from this sympatric zone. Methods Pollen dispersal distance was compared with nearest-neighbours distance, and the differentiation in the pollen pool among mother plants was estimated. In addition, the correlation between genetic differentiation and spatial distance among plants was tested. All adult individuals (252) within a space of 2800m2 and 15 open-pollinated progeny (285 seedlings) were analysed. Genetic analyses were based on 12 polymorphic microsatellite loci. Key Results A high proportion of self-pollination was found, indicating a mixed-mating system. The maximum pollen dispersal distance was 1013 m, but most pollination events (96 %) occurred at a distance of 0m, predominantly in an inbreeding system. Both parents among sampled individuals could be identifed in 60–85 % of the progeny. Conclusions The results show that most pollen dispersal in the hawkmoth-pollinated P. axillaris subsp. axillaris occurs within populations and there is a high proportion of inbreeding. This mating system appears to favour species integrity in a secondary contact zone with the congener species P. exserta.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAnnals of Botany, London. Vol. 115 (2015), p. 939-948pt_BR
dc.rightsOpen Accessen
dc.subjectPollen dispersalen
dc.subjectPetunia axillarispt_BR
dc.subjectPetunia exsertapt_BR
dc.subjectBreeding structureen
dc.subjectPetunia axillarisen
dc.subjectPólenpt_BR
dc.subjectBioma Pampapt_BR
dc.subjectPetunia exsertaen
dc.subjectSolanaceaeen
dc.subjectPampasen
dc.subjectSelfingen
dc.subjectInbreedingen
dc.subjectGenetic structureen
dc.subjectMicrosatellitesen
dc.subjectHawkmoth pollinationen
dc.subjectGene flowen
dc.titlePollen dispersal and breeding structure in a hawkmoth-pollinated pampa grasslands species Petunia axillaris (Solanaceae)pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000966494pt_BR
dc.type.originEstrangeiropt_BR


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