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Abstract Detail

Recent Topics Posters

Sweeten, Kayla [1], Parker, V. T. [2].

Phylogeny and biogeography of “little clade” Arctostaphylos using cpDNA.

The manzanitas (Arctostaphylos, Ericaceae) are an ecologically important genus of woody plants with a center of diversity in the California Floristic Province. Building a well-supported and detailed phylogeny of the genus has been difficult, possibly due to recent rapid radiation and continued instances of hybridization. Previous phylogenetic studies have defined two major “clades” within Arctostaphylos, though structure within those clades remained unclear. In this study, we investigate relationships in the smaller of the two clades: a set of 10 species that includes several rare edaphic endemics as well as three of the most geographically widespread manzanita species (A. uva-ursi, A. patula, and A. pungens). Previous work identified several potentially highly variable chloroplast intergenic spacer regions for Arctostaphylos; here, we sequenced ndhF-rpl32 and rpl32-trnL for multiple individuals of each “little clade” species. Most interestingly, in the resulting trees each of the three widespread species appear paraphyletic: individuals form clades by broad geographic region rather than by species. Though this means that the relationships within the “little clade” are still poorly defined, the data may prove useful for understanding the history of dispersal and introgression in Arctostaphylos.

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1 - San Francisco State University, Biology, 1600 Holloway Ave., San Francisco, CA, 94132, USA
2 - San Francisco State University, Biology, 1600 Holloway Avenue, Department Of Biology, San Francisco, CA, 94132, United States

none specified

Presentation Type:
Session: P, Recent Topics Posters
Location: Arizona Ballroom/Starr Pass
Date: Monday, July 29th, 2019
Time: 5:30 PM
Number: PRT036
Abstract ID:1418
Candidate for Awards:None


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