Abstract Detail



Conservation Biology

Cohen, Jim [1], Anderson, Joelle [2], Williams, Doressa [3], Ryan, Gillian [2], Ruane, Lauren [4].

Population structure and migration of Phlox hirsuta (Polemoniaceae), a threatened serpentine species.

Phlox hirsuta, the Yreka Phlox, a threatened species native to northern California, is known from five populations in the area around Yreka, and all occurrences are on serpentine soil.  In order to examine population structure, migration, and patterns of selection, single nucleotide polymorphisms (SNPs) generated via tunable Genotyping-by-Sequencing (tGBS) and 12 microsatellite loci, were utilized for individuals from four of the five populations (China Hill, Cracker Gulch, Greenhorn, and Soap Creek Ridge).  Analyses of population structure identify three clusters: 1) China Hill, 2) Greenhorn, and 3) Cracker Gulch and Soap Creek Ridge, and similar results were obtained with both SNPs and microsatellites.  Migration occurs among the populations, with historical patterns involving migration toward the southern part of the small range of the species; however, current patterns involve migration in the opposite direction. Results suggest that the number of individuals in populations has been increasing recently, a hopeful finding for a rare species with a restricted geographic distribution, and populations for management and conservation have been recognized.  Additionally, floral morphology was examined among three populations to understand variation in floral organ heights and lengths as well as the relationship and potential for gene flow between P. hirsuta and a widespread co-occurring congener, Phlox speciosa.  These examinations demonstrate that the anthers of P. speciosa are at the same height as the stigmas of P. hirsuta, suggesting that gene flow would be unidirectional from the widespread species to the rare one. Analyses of microsatellites provide a similar conclusion.


1 - Kettering University, 1700 University Ave., Flint, MI, 48503.0, United States
2 - Kettering University
3 - Southern Mississippi University, USA
4 - Christopher Newport University, Organismal And Environmntal Biology, 1 Avenue Of The Arts, Newport News, VA, 23606, United States

Keywords:
Phlox
Polemoniaceae
serpentine
flower morphology
Conservation Genomics.

Presentation Type: Oral Paper
Number: 0001
Abstract ID:368
Candidate for Awards:None


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