PMID: 11607157Mar 1, 1991Paper

Chloroplast DNA evidence for a North American origin of the Hawaiian silversword alliance (Asteraceae)

Proceedings of the National Academy of Sciences of the United States of America
B G BaldwinG D Carr

Abstract

Chloroplast DNA restriction-site comparisons were made among 24 species of the Hawaiian silversword alliance (Argyroxiphium, Dubautia, and Wilkesia) and 7 species of North American perennial tarweeds in Adenothamnus, Madia, Raillardella, and Raillardiopsis (Asteraceae-Madiinae). These data and results from intergeneric hybridization indicated surprisingly close genetic affinity of the monophyletic Hawaiian group to two diploid species of montane perennial herbs in California, Madia bolanderi and Raillardiopsis muirii. Of 117 restriction-site mutations shared among a subset of two or more accessions, more than one-fifth (25 mutations) separated the silversword alliance, M. bolanderi, and Raillardiopsis from Adenothamnus and Raillardella. An additional 10 mutations distinguished the silversword alliance, M. bolanderi, and R. muirii from Adenothamnus, Raillardella, and Raillardiopsis scabrida. Phylogenetic analyses of these data and production of vigorous hybrids of the combinations Dubautia laevigata x R. muirii and (Dubautia knudsenii x Dubautia laxa) x M. bolanderi reinforce and refine Carlquist's hypothesis [Carlquist, S. (1959) Aliso 4, 171-236] that the Hawaiian silversword alliance arose from American tarweeds. Ultimate ori...Continue Reading

References

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Citations

May 17, 2006·Trends in Ecology & Evolution·Ole Seehausen
Nov 15, 2003·Molecular Phylogenetics and Evolution·Amy Lawton-Rauh
Mar 2, 2005·Molecular Phylogenetics and Evolution·Karin TremetsbergerSalvador Talavera
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Aug 5, 1998·Proceedings of the National Academy of Sciences of the United States of America·B G Baldwin, M J Sanderson
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