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Title

Phylogeny of the New World diploid cottons (Gossypium L., Malvaceae) based on sequences of three low-copy nuclear genes

AuthorsÁlvarez, Inés; Cronn, Richard C.; Wendel, Jonathan F.
KeywordsGossypium
Houzingenia
Cotton
Phylogeny
Low-copy nuclear genes
Alcohol dehydrogenases
Cellulose synthase
Issue DateMay-2005
PublisherSpringer
CitationPlant Systematics and Evolution 252(3-4): 199-214 (2005)
AbstractAmerican diploid cottons (Gossypium L., subgenus Houzingenia Fryxell) form a monophyletic group of 13 species distributed mainly in western Mexico, extending into Arizona, Baja California, and with one disjunct species each in the Galapagos Islands and Peru. Prior phylogenetic analyses based on an alcohol dehydrogenase gene (AdhA) and nuclear ribosomal DNA indicated the need for additional data from other molecular markers to resolve phylogenetic relationships within this subgenus. Toward this end, we sequenced three nuclear genes, the anonymous locus A1341, an alcohol dehydrogenase gene (AdhC), and a cellulose synthase gene (CesA1b). Independent and combined analyses resolved clades that are congruent with current taxonomy and previous phylogenies. Our analyses diagnose at least two long distance dispersal events from the Mexican mainland to Baja California, following a rapid radiation of the primary lineages early in the diversification of the subgenus. Molecular data support the proposed recognition of a new species closely related to Gossypium laxum that was recently collected in Mexico.
Description16 pages, 3 figures, 2 tables.-- Full-text version available Open Access at: http://www.rjb.csic.es/jardinbotanico/ficheros/documentos/pdf/pubinv/IAF/19.pdf
Publisher version (URL)http://dx.doi.org/10.1007/s00606-004-0294-0
URIhttp://hdl.handle.net/10261/14997
DOI10.1007/s00606-004-0294-0
ISSN0378-2697
E-ISSN1615-6110
Appears in Collections:(RJB) Artículos

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