Jabaily, Rachel S. , Gustafsson, Mats H. G. , Motley, Timothy J. .
Molecular phylogeny of the Goodeniaceae- implications for taxonomy, morphology and biogeography.
The Goodeniaceae, with over 400 species in eleven genera, exhibit marked variability in floral color, structure and symmetry, seed and pollen morphology, hair location, and types of pollinator guides. The method of pollen presentation on the stylar indusium, the key synapomorphic character of the family, also varies. The group has radiated extensively in Australia, particularly in the Southwest Botanical Province and throughout the Pacific Islands, including Hawaii. Goodeniaceae is also of systematic interest because of its position within the Asterales, sister to Asteraceae and Calyceraceae. A comprehensive molecular systematic study of the family with ample sampling of all recognized genera is presented in order to test hypotheses of morphological character evolution and biogeographic patterns throughout the Austral-Pacific basin. The cpDNA regions trnL-F and matK were sequenced and provided ample variation to resolve intergeneric and interspecific relationships with high support. Two major clades of Goodeniaceae are recovered- the Dampiera/Lechenaultia/Anthotium group, all with connate anthers, is sister to a larger clade with primarily adnate anthers composed of Goodenia/Scaevola/Coopernookia and several other monotypic genera, including Brunonia , formerly placed in the monotypic Brunoniaceae. All genera are monophyletic, with the exception of Goodenia which is paraphyletic containing Verreauxia and Velleia . Monotypic genera are sister to larger species-rich clades repeatedly throughout the phylogeny. Mapping of detailed morphological data helps explain evolutionary relationships and better defines subgeneric relationships.
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1 - Old Dominion University, Biology, 110 Mills Godwin Building, Norfolk, VA, 23529, USA
2 - University of Aarhus, Systematic Botany, Institute of Biological Sciences, Ole Worms Allé, building 1137, Aarhus C, 1137, Denmark
Presentation Type: Oral Paper:Papers for Sections
Location: 556A/Convention Center
Date: Tuesday, August 3rd, 2010
Time: 1:15 PM