Genetic variation (AFLPS and nuclear microsatellites) in two anagenetically derived endemic species of Myrceugenia (MYRTACEAE) on the Juan Fernandez Islands, Chile

dc.creatorLopez-Sepulveda, P.
dc.creatorTakayama, K.
dc.creatorGreimler, J.
dc.creatorPenailillo, P.
dc.creatorCrawford, DJ.
dc.creatorBaeza, M.
dc.creatorRuiz, E.
dc.creatorKohl, G.
dc.creatorTremetsberger, K.
dc.creatorGatica, A.
dc.creatorLetelier, L.
dc.creatorNovoa, P.
dc.creatorNovak, J.
dc.creatorStuessy, T.F.
dc.date2013-11-20T12:25:05Z
dc.date2013-11-20T12:25:05Z
dc.date2013-04
dc.date.accessioned2017-03-07T15:00:23Z
dc.date.available2017-03-07T15:00:23Z
dc.identifierAMERICAN JOURNAL OF BOTANY Volume: 100 Issue: 4 Pages: 722-734 DOI: 10.3732/ajb.1200541
dc.identifier0002-9122
dc.identifierhttp://dspace.utalca.cl/handle/1950/9461
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/376481
dc.descriptionPenailillo, P (Penailillo, Patricio). Univ Talca, Inst Biol Vegetal & Biotecnol, Talca, Chile
dc.descriptionPremise of the study: Anagenesis (or phyletic evolution) is one mode of speciation that occurs in the evolution of plants on oceanic islands. Of two endemic species on the Juan Fernandez Islands (Chile), Myrceugenia fernandeziana and M. schulzei (Myrtaceae), believed to have originated anagenetically from different continental progenitors, the first is endemic to Robinson Crusoe Island and has no clear tie to continental relatives; the last is endemic to the younger island, Alejandro Selkirk Island, and has close affinity to M. colchaguensis in mainland Chile. Methods: Using AFLPs and six nuclear microsatellites from 381 individuals representing 33 populations, we determined patterns of genetic variation within and among populations on both islands and between those of the islands and mainland. Key results: Considerable genetic variation was found within populations on both islands. The level of gene diversity within M. schulzei was equivalent to that of its close continental relative M. colchaguensis. Genetic diversity was not partitioned geographically in M. fernandeziana and was weakly so and nonsignificantly in M. schulzei. Conclusions: The high genetic variation in both taxa is most likely due to anagenetic speciation. Subsidence of the older island Robinson Crusoe, landscape erosion, and restructuring of communities have severely reduced the overall island population to a single panmictic system. On the younger and less modified Alejandro Selkirk Island, slightly stronger patterns of genetic divergence are seen in M. schulzei. Because both species are genetically diverse and number in the thousands of individuals, neither is presently endangered in the archipelago.
dc.languageen
dc.publisherBOTANICAL SOC AMER INC, PO BOX 299, ST LOUIS, MO 63166-0299 USA
dc.subjectanagenesis
dc.subjectbiogeography
dc.subjectJuan Fernandez Islands
dc.subjectMyrtaceae
dc.subjectMyrceugenia
dc.subjectpopulation genetics
dc.subjectspeciation
dc.titleGenetic variation (AFLPS and nuclear microsatellites) in two anagenetically derived endemic species of Myrceugenia (MYRTACEAE) on the Juan Fernandez Islands, Chile
dc.typeArtículos de revistas


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