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dc.contributor.author Okada, M. R. en
dc.contributor.author Whitkus, Richard en
dc.contributor.author Lowrey, T. K. en
dc.date.accessioned 2011-06-30T21:14:30Z en
dc.date.available 2011-06-10T21:14:30Z en
dc.date.issued 1997 en
dc.identifier.citation Okada, M., R. Whitkus, and T. K. Lowrey. 1997. Genetics of adaptive radiation in Hawaiian and Cook Islands species of Tetramolopium (Asteraceae: Astereae): I. Nuclear RFLP marker diversity. American Journal of Botany 84: 1236-1246 en
dc.identifier.issn 0002-9122 en
dc.identifier.uri http://hdl.handle.net/10211.1/859 en
dc.description Published by and copyright of the Botanical Society of America. The definitive version of this article is available at http://www.amjbot.org/content/84/9/1236.full.pdf+html?sid=52169850-4ff7-466d-b182-5388a7e7d10e en
dc.description.abstract Thirty-three nuclear RFLP (restriction fragment length polymorphism) probes were used to study genetic diversity in Hawaiian and Cook Islands species of Tetramolopium for comparison with previous morphological and isozyme studies and to provide greater resolution of the events associated with adaptive radiation in the genus. Levels of RFLP diversity are greater than those reported for isozymes, yet are still low in comparison to continental species. Genetic differentiation is greatest among species in sections rather than among sections and is concordant with the hypothesis of phyletic sorting of initial variability as suggested for morphological traits. Hypothesized introgression between T. lepidotum and T. filiforme is supported, but the evidence suggests bidirectional gene flow. Systematic relationships derived from the data agree with hypotheses based on morphology in the placement of populations within their respective species and the recognition of three main lineages within Hawaii. Inclusion of the Cook Islands species, however, renders section Tetramolopium paraphyletic, contradicting morphological, ecological, and crossing evidence. Interpreting these results in light of evidence from previous studies, the genetic diversity and relationships seen among species and sections of Hawaiian and Cook Islands Tetramolopium reflect the recent and rapid evolution of this group, limited addition of new variability, and phyletic sorting. en
dc.description.uri http://www.amjbot.org/content/84/9/1236.full.pdf+html?sid=52169850-4ff7-466d-b182-5388a7e7d10e en
dc.language.iso en_US en
dc.publisher American Journal of Botany en
dc.subject Tetramolopium en
dc.subject nuclear RLFP en
dc.subject adaptive radiation en
dc.subject marker diversity en
dc.title Genetics of Adaptive Radiation in Hawaiian and Cook Islands Species of Tetramolopium (Asteraceae; Astereae) : I. Nuclear RFLP Marker Diversity en
dc.type Article en
dc.relation.journal American Journal of Botany en
dc.contributor.sonomaauthor Whitkus, Richard en


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