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Abstract Detail

Systematics Section

Barkworth, Mary E. [1], Bushman, B. Shaun [2].

Morphological, geographic, and phylogenetic studies in Melica (Poaceae: Meliceae).

Melica is a genus of 80-90 species that is well represented in Eurasia and both North and South America but poorly represented in Africa and absent from Australia. It differs from Glyceria, the other large genus in the Meliceae, in its strong representation in South America and its absence from Australia. As a first step in examining the phylogeography of Melica we are developing comparable descriptions of its species (based on existing revisions), a geographic database, and a molecular phylogeny. These are being used to evaluate alternative hypotheses concerning the origins of today’s distribution pattern, for example: a) Eurasia to North America, West and East, thence to South America; b) Eurasia to western North America, thence to western South America and eastern portions of both continents; c) South America to North America and Eurasia; and d) North America to Eurasia and South America. The results will be compared with similar information for members of another large basal pooid tribe, Stipeae.

Broader Impacts:
We are posting the descriptions to the Web as we develop them, a process that may require translation and reorganization from and original work (which is prominently cited on the Web page. Similarly, we shall post our geographic information to the Web, together with information about its source.

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1 - Utah State University, Intermountain Herbarium, Dept. of Biology, 5305 Old Main Hill, Logan, Utah, 84322, USA
2 - USDA Agricultural Research Service, Forage and Range Research Laboratory, 6300 Old Main Hill, Logan, Utah, 84322-6300, USA


Presentation Type: Oral Paper:Papers for Sections
Session: 26
Location: 556B/Convention Center
Date: Tuesday, August 3rd, 2010
Time: 10:15 AM
Number: 26009
Abstract ID:579

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