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Abstract Detail

Systematics Section/ASPT

Gardner, Elliot M. [1], Sarraf, Paya [2], Zerega, Nyree J.C. [1].

Molecular phylogeny and biogeography of Maclura (Moraceae).

Maclura Nutt. (Moraceae) is a widespread genus of about 12 species of trees, scandent shrubs, and woody climbers. It ranges from temperate North America to tropical South America, and from southeast Asia to eastern Australia, with a single species in southern Africa. The greatest species diversity is in southeast Asia (8 spp.). Its current circumscription represents the combination of four previously-recognized genera, and its placement within Moraceae is uncertain. Previous studies have placed Maclura in a monogeneric tribe sister to the Dorstenieae, Castilleae, and Ficeae, but with low bootstrap support. Like the Dorstenieae (s.l.), Maclura contains some species with plesiomorphic stamens inflexed in the bud as well as species with straight stamens; it thus may represent an intermediate grade of floral evolution within Moraceae. We present the most complete molecular phylogeny of Maclura todate, based on analyses of multi-locus sequence data from both nuclear and chloroplast regions. Our results strongly support a monophyletic Maclura and provide the best support to date for its placement in Moraceae. Based on the phylogeny, we also propose origin and dispersal patterns for this widespread genus.

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1 - Northwestern University / Chicago Botanic Garden, Plant Biology and Conservation, 2205 Tech Drive, 2-144 Hogan, Evanston, IL, 60208, United States
2 - Northwestern University, Program in Biological Sciences, 2205 Tech Drive, 2-144 Hogan, Evanston, IL, 60208, United States

none specified

Presentation Type: Oral Paper:Papers for Sections
Session: 5
Location: Rosedown/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 11:15 AM
Number: 5011
Abstract ID:93
Candidate for Awards:None

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