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Abstract Detail

Recent Topics Posters

Chong, Jer Pin  [1], Zaya, David [2], Ashley, Mary [3], Coons, Janice [4], Molano-Flores, Brenda [5].

Population genetics of a narrowly endemic species in Arizona: to list or not to list?

Physaria kingii subsp. kaibabensis (Brassicaceae; Kaibab bladderpod), is a narrow endemic found on limestone-clay knolls, in open and parklike meadows at 2500-2700 meters on the Kaibab Plateau in Coconino County within the Kaibab National Forest (KNF), Arizona.  The US Forest Service considers P. kingii subsp. kaibabensis as a forest service sensitive species.  In addition, in 2009 the USFW included this species as part of a petition for potential listing in the southwestern US under the Endangered Species Act.  Within the KNF two congeners, P. arizonica and P. kingii subsp. latifolia, also are found and population surveys of P. kingii subsp. kaibabensis showed the possibility of hybridization between them.  The goal of this study was to determine if gene flow is occurring between Pkk and its congeners.  Leaf material was collected from a total of 19 populations (13 P. kingii subsp. kaibabensis, 3 P. arizonica, and 3 P. kingii subsp. latifolia).  STRUCTURE analyses with 7 microsatellite loci showed 1) P. arizonica samples are genetically distinct from the other two taxa, and 2) P. kingii subsp. kaibabensis and P. kingii subsp. latifolia belong to a single genetic cluster.  Although several morphological differences (in particular flower color) exist between P. kingii subsp. kaibabensis and P. kingii subsp. latifolia, this study provides evidence that they are genetically similar, forming a panmictic population. The USFW should consider this finding as part of their listing process.   

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1 - University Of Illinois At Chicago, Biological Sciences
2 - University of Illinois, Illinois Natural History Survey
3 - University Of Illinois At Chicago, Biological Sciences, 845 W. Taylor St., M/C 066, Chicago, IL, 60607, United States
4 - Eastern Illinois University, Biological Sciences Department, 600 Lincoln Avenue, Charleston, IL, 61920.0, United States
5 - University Of Illinois, Illinois Natural History Survey, 1816 South Oak Street, Champaign, IL, 61820, United States

conservation genetics

Presentation Type:
Session: P, Recent Topics Posters
Location: Arizona Ballroom/Starr Pass
Date: Monday, July 29th, 2019
Time: 5:30 PM
Number: PRT018
Abstract ID:1394
Candidate for Awards:None

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