Self-incompatibility, inbreeding depression and crossing potential in five Brazilian Pleurothallis (Orchidaceae) species

dc.creatorBorba, EL
dc.creatorSemir, J
dc.creatorShepherd, GJ
dc.date2001
dc.dateJUL
dc.date2014-11-18T00:12:15Z
dc.date2015-11-26T17:43:45Z
dc.date2014-11-18T00:12:15Z
dc.date2015-11-26T17:43:45Z
dc.date.accessioned2018-03-29T00:25:51Z
dc.date.available2018-03-29T00:25:51Z
dc.identifierAnnals Of Botany. Academic Press Ltd, v. 88, n. 1, n. 89, n. 99, 2001.
dc.identifier0305-7364
dc.identifierWOS:000169583600009
dc.identifier10.1006/anbo.2001.1435
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/71389
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/71389
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/71389
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1287678
dc.descriptionIntra- and interspecific experimental pollinations were made to determine the mating systems and the interspecific crossing potential in individuals from 24 populations of five Pleurothallis species. Pleurothallis johannensis, P. ochreata and P. teres show weak or partial self-incompatibility while P. adamantinensis and P, fabiobarrosii are more strictly self-incompatible. We found no differences in Fruit set between intra- and interpopulation intraspecific crosses, and there was no correlation between Fruit set and genetic variability or inbreeding in these species. All species are interfertile and showed no correlation between genetic similarity and crossing potential. We scored fruits for seed viability and observed a strong inbreeding depression in all populations: however, there was no difference in seed viability among intrapopulation, interpopulation intraspecific and interspecific cross-pollinations. These species are pollinated by flies with a behavioural pattern that facilitates self-pollination. Self-incompatibility and inbreeding depression are apparently important in the maintenance of the unusually high levels of genetic variability found in these species. As generally observed in other orchid species, barriers to hybridization between these Pleurothallis species are at the level of pollination. (C) 2001 Annals of Botany Company.
dc.description88
dc.description1
dc.description89
dc.description99
dc.languageen
dc.publisherAcademic Press Ltd
dc.publisherLondon
dc.publisherInglaterra
dc.relationAnnals Of Botany
dc.relationAnn. Bot.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectPleurothallis
dc.subjectOrchidaceae
dc.subjectmating system
dc.subjectself-incompatibility
dc.subjectinbreeding depression
dc.subjectfruit set
dc.subjectseed set
dc.subjectpolyembryony
dc.subjectinterspecific compatibility
dc.subjectReproductive-biology
dc.subjectBreeding Systems
dc.subjectGenetic Load
dc.subjectPollination
dc.subjectEvolution
dc.subjectPlants
dc.subjectLeguminosae
dc.subjectVenezuela
dc.subjectForest
dc.subjectFertilization
dc.titleSelf-incompatibility, inbreeding depression and crossing potential in five Brazilian Pleurothallis (Orchidaceae) species
dc.typeArtículos de revistas


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