Evolution and Taxonomy of the Dryadoideae

Monaghan, Leann

Evolution and Taxonomy of the Dryadoideae

dc.contributor.advisor	Moore, Abigail
dc.contributor.author	Monaghan, Leann
dc.contributor.committeeMember	Lupia, Richard
dc.contributor.committeeMember	Souza, Lara
dc.date.accessioned	2024-07-31T21:19:36Z
dc.date.available	2024-07-31T21:19:36Z
dc.date.issued	2024-08-01
dc.date.manuscript	2024-07-24
dc.description.abstract	Dryadoideae is one of three subfamilies within Rosaceae (the rose family) whose genera largely preside in the western part of North America. It contains mountain mahogany (Cercocarpus), mountain misery (Chamaebatia), cliff-rose (Purshia), and mountain avens (Dryas); many of these taxa house nitrogen-fixing bacteria belonging to the genus Frankia. There is also a long fossil record of these plants dating back to the Tertiary period. Morphological variation within Cercocarpus is of particular interest due to the presence of many high-quality leaf fossils. The precise relationships among and within the genera within Dryadoideae are not well-understood due to limitations in previous genetic data used and their conflicting phylogenetic hypotheses. The aim of this study is to resolve phylogenetic relationships within the subfamily, with an emphasis on Cercocarpus and Purshia, using hundreds of highly conserved and low-copy nuclear loci through target-capture (HybSeq) sequencing using the Angiosperm 353 baits and to morphologically compare leaves of extant and extinct species of Cercocarpus. Overall, in both genetic and morphological analyses, C. mojadensis and C. pringlei are most closely related. The subfamily Dryadoideae is strongly supported, and Purshia, Cercocarpus, and Chamaebatia were monophyletic. More data is needed to parse out how exactly the species in both Cercocarpus and Purshia are related. The morphological analyses offer some insight on how the Cercocarpus species relate to each other morphologically but would benefit from increased sampling.	en_US
dc.identifier.uri	https://hdl.handle.net/11244/340548
dc.language	en_US	en_US
dc.rights	Attribution-NonCommercial 4.0 International	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc/4.0/	*
dc.subject	Dryadoideae	en_US
dc.subject	Taxonomy	en_US
dc.subject	Phylogenetics	en_US
dc.subject	Morphology	en_US
dc.thesis.degree	Master of Science	en_US
dc.title	Evolution and Taxonomy of the Dryadoideae	en_US
ou.group	Dodge Family College of Arts and Sciences::School of Biological Sciences	en_US