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Abstract Detail

Recent Topics Posters

Wood, Kaitlyn [1], Neri, Jordan [2], Boland, Robert [2], Cohen, Jim [3], Ruane, Lauren [4].

The demographics, life history, and population genetics of Yreka Phlox (Phlox hirsuta), an endangered species.

Phlox hirsuta (Polemoniaceae) is an endangered perennial species endemic to serpentine soils. Its distribution is limited to five populations near Yreka in northern California. Although individuals can produce hundreds of flowers, approximately 80% of flowers fail to develop fruit. Results from previous experiments suggest that a combination of factors—including pollen inviability, self-pollen interference, and florivory—limit fruit set in this self-sterile species. However, we do not yet know if fecundity limits its population growth. A long-term demography project is presently underway to determine the degree to which each life history stage is hindering (or promoting) population growth. We are currently monitoring the survival, growth, and reproduction over time of 1,027 plants ranging in age from first year seedlings to relatively large adults. Results of germination studies in the field and lab demonstrate that many seeds initiate, but do not successfully complete, the germination process. Additionally, of the small percentage of seeds that successfully germinate, even fewer survive as seedlings. Along with germination studies, the population genetics of the species will be explored with the use of single nucleotide polymorphisms (SNP) and microsatellite loci. Currently, 192 samples from four populations of the species are being sequenced, for SNPs, using genotyping-by-sequencing. Microsatellites developed for species of Phlox will also be employed, in P. hirsuta, as a comparison to the SNP data. Combined, our research will identify the life-history stage(s) that are limiting or promoting population growth and elucidate population structure and demographic history. 

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1 -, Department of Organismal and Environmental Biology, 1 Avenue of the Arts, Newport News, VA, 23606, USA
2 - Christopher Newport University, Department of Organismal and Environmental Biology, 1 Avenue of the Arts, Newport News, VA, 23606, USA
3 - Kettering University, Applied Biology, 1700 University Ave., Flint, MI, 48504, USA
4 - Christopher Newport University, Biology, Chemistry And Environmental Science, 1 Avenue Of The Arts, Newport News, VA, 23606, USA

seed germination

Presentation Type: Recent Topics Poster
Session: P, Recent Topics Posters
Location: Exhibit Hall/Omni Hotel
Date: Monday, June 26th, 2017
Time: 5:30 PM
Number: PRT009
Abstract ID:751
Candidate for Awards:None

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