| The evolutionary origin of a second radiation of annual Castilleja (Orobanchaceae) species in South America: The role of long distance dispersal and allopolyploidy. | |
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MedLine Citation:
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PMID: 21622312 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Considerable attention has been directed toward understanding the wide gaps in range that are common among many groups of closely related organisms. By placing their biology and geography in a phylogenetic context, we may gain a broader knowledge of the series of historical events that have led to present species distributions. In addition to the North American annuals, a second radiation of annual Castilleja species is in Andean Peru and central Chile. Phylogenetic analyses of chloroplast and nuclear DNA regions revealed a complex history for the origin and diversification of annual Castilleja species in South America. In addition to at least three independent long-distance dispersal events from North America, allopolyploidy has played a significant role in this disjunct radiation. Only C. attenuata occurs in both California and South America, and these results support its recent arrival to central Chile. Two Peruvian species are inferred to be allopolyploids; hybridization between annual lineages derived from independent long-distance dispersal events from North America gave rise to C. profunda, and hybridization between South American annual and perennial species gave rise to C. cerroana. The relative importance these events are discussed with reference to the observed morphological, ecological, and distributional patterns. |
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Authors:
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David C Tank; Richard G Olmstead |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of botany Volume: 96 ISSN: 0002-9122 ISO Abbreviation: Am. J. Bot. Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2011-05-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370467 Medline TA: Am J Bot Country: United States |
Other Details:
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Languages: eng Pagination: 1907-21 Citation Subset: - |
Affiliation:
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Department of Forest Resources & Stillinger Herbarium, College of Natural Resources, University of Idaho, P.O. Box 441133, Moscow, Idaho 83844-1133 USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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