Systematics Section / ASPT
Beck, John , Small, Randall .
Preliminary investigation of Sida and related genera (Malvaceae) based on analysis of chloroplast DNA rpL16 intron sequences.
The genus Sida (Malvaceae, tribe Malveae) is a species-rich group of global distribution. Generic circumscription of Sida has historically been problematic, however, and a number of segregate genera have been proposed to accommodate species originally placed in a large and heterogeneous Sida s. l. Sida s.s. is currently divided into eleven sections based on morphological data, and along with the segregate genera, comprise an informal group known as the Sida alliance. A recent phylogenetic analysis of the Sida alliance based on nuclear ribosomal ITS sequences recovered a group of Sida species (including the segregate genus Dendrosida) that represent the Sida “core.” This analysis also suggested that Sida is polyphyletic and a number of species currently classified in Sida are actually more closely related to other genera than to the Sida core. To complement and extend the phylogenetic analysis based on ITS sequences we have sequenced a noncoding chloroplast DNA region (the rpL16 intron) for species currently classified in Sida and segregate genera. The goal of the study is to assess the monophyly of the named sections of Sida, the relationships among Sida and related genera, and to provide a framework for subsequent more focused studies of individual groups of Sida species.
1 - University of Tennessee, Department of Botany, 437 Hesler Biology, Knoxville, Tennessee, 37996, USA
Presentation Type: Paper
Location: Cottonwood A (Snowbird Center)
Date: Tuesday, August 3rd, 2004
Time: 5:15 PM