An ITS-based phylogenetic analysis of theEuryptera species group inLomatium (Apiaceae) |
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Authors: | T M Hardig Pamela S Soltis |
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Institution: | (1) Department of Biology and Chemistry, University of Montevallo, 35115 Montevallo, Alabama, USA;(2) Department of Botany, Washington State University, 99164-4238 Pullman, Washington, USA |
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Abstract: | Lomatium, the largest genus of Apiaceae in western North America, includes many narrow endemics whose relationships are uncertain. Although no infrageneric classification exists forLomatium, several informal groups have been recognized. TheEuryptera group comprises seven narrowly endemic species distributed primarily in California. We conducted parsimony and maximum likelihood (ML) analyses using sequences of the internal transcribed spacers (ITS) of the nuclear ribosomal DNA from species of theEuryptera group and several other species ofLomatium. When considered with distribution, morphological, and cpDNA data, the ITS analyses are consistent with the monophyly of theEuryptera group and suggests that speciation in this group has occurred through geographical divergence. Inferences from ITS data also identify putative progenitors of the polyploidEuryptera species. |
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Keywords: | Apiaceae Lomatium Euryptera group ITS sequences molecular systematics phylogenetic analysis parsimony maximum likelihood |
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