Abstract Detail

Exploring the utility and limits of target enrichment methods to study polyploidy and reticulate evolution

Moore, Abigail [1], Edwards, Erika [2].

Assessing the importance of hybridization in the diversification of Anacampseros (Anacampserotaceae, Caryophyllales) in the Cape Floristic Region using targeted sequence capture data.

Anacampseros are a group of rosette succulents that are most diverse in South Africa and Namibia.  Most species are narrow endemics and are restricted to a specific substrate, although cause and effect are not always clear (i.e., whether they are restricted to a specific substrate because they have a small range, or have a small range because they are restricted to that substrate).  These narrow-endemic species are largely in the Northern Cape Province of South Africa and adjacent Namibia.  Other species have wider distributions, although they may have morphologically cryptic entities within them.
Targeted sequence capture data were used to produce a well-resolved phylogeny of the Anacampserotaceae.  Many of the clades were supported by morphology, including a clade characterized by reduced succulent leaves covered by large, papery scales (formerly separated as the genus Avonia).  Although some species were hypothesized to be of hybrid origin, this was not apparent in the concatenated or coalescent-based phylogeny, where internal branches were generally well-supported.  We are currently examining ways of determining the importance of hybridization in this group, including in cases where there is one dominant signal and a smaller, but still significant proportion, of the genome is derived from hybridization.

1 - University Of Oklahoma, Department Of Microbiology And Plant Biology, 770 Van Vleet Oval, Rm. 208, Norman, OK, 73019, United States
2 - Yale University, Department Of Ecology And Evolutionary Biology, 165 Prospect St, New Haven, CT, 06511, United States

Keywords:
Caryophyllales
Portullugo
Portulacineae
target capture
hybridization
reticulate evolution
Anacampseros
Cape Floristic Region.

Presentation Type: Colloquium Presentations
Session: COL04, Exploring the utility and limits of target enrichment methods to study polyploidy and reticulate evolution
Location: Virtual/Virtual
Date: Tuesday, July 28th, 2020
Time: 11:30 AM
Number: COL04007
Abstract ID:655
Candidate for Awards:None