ISSN:
1615-6110
Keywords:
Polemoniaceae
;
Gilia millefoliata
;
Gilia laciniata
;
Long-distance dispersal
;
Baker's Rule
;
ITS sequence
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Although separated by 7000-km,Gilia millefoliata, a rare annual plant from California and Oregon coastal dunes andG. valdiviensis, a rare Chilean coastal endemic are morphologically and ecologically quite similar. Their disjunct distribution was proposed to result from recent, birdmediated, intercontinental long-distance dispersal. Both species are morphologically similar to the abundant and ecologically diverse South American taxonG. laciniata. The relationship among these three taxa was investigated using DNA sequence from the nuclear ribosomal (ITS) and chloroplasttrnL regions, as well as isozyme and morphological variation to determine the roles of long-distance dispersal and ecological adaptation in the evolution of the group. These data suggest that aG. millefoliata-like ancestor underwent long-distance dispersal to South America, and there gave rise to the narrow endemicG. valdiviensis and the widespreadG. laciniata.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00985264
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