Molecular Confirmation of the Position of <Emphasis Type="Italic">Gossypium trifurcatum</Emphasis> Vollesen |
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Authors: | Email author" target="_blank">Ryan A?RappEmail author Ines?Alvarez Jonathan F?Wendel |
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Institution: | (1) Department of Ecology, Evolution, and Organismal Biology, Iowa State University, 353 Bessey Hall, 50011 Ames, Iowa, USA |
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Abstract: | Taxonomic understanding is a necessary prerequisite for intelligent germplasm maintenance and evaluation. Here, we use molecular
evidence to address the generic position of the poorly known and morphologically unusual taxon Gossypium trifurcatum Vollesen. This species possesses dentate leaves, a feature not otherwise found in Gossypium L. but one that is common in Cienfuegosia Cav., a related genus in the small Malvaceous tribe Gossypieae. G. trifurcatum is a rare plant, restricted to deserts of Eastern Somalia and known from only two collections, the last in 1980. Using DNA
extracted from an herbarium specimen, we amplified and sequenced the chloroplast gene ndhF. Phylogenetic analysis reveals G. trifurcatum to be cladistically nested within Gossypium. These data diagnose dentate leaves as an autapomorphy within a genetically diverse assemblage of African–Arabian species,
which remain the least well-represented cottons in germplasm collections. |
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Keywords: | Cotton Gossypium ndhF Phylogeny Taxonomy |
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