Genetic differentiation between two species of buckwheat (Eriogonum)


Discovering the extent of genetic differentiation between closely related taxa facilitates decisions regarding species protection under the Endangered Species Act. Here, we analyze genotype data to explore the relatedness of two buckwheat species: Eriogonum soredium Reveal- a narrow endemic under consideration for protection, and a widespread close relative, Eriogonum shockleyi S. Watson. Eriogonum soredium grows only on Ordovician limestone outcroppings in west central Utah, whereas the range of E. shockleyi is broad, spanning the western United States from Colorado to California, and Idaho to Arizona. Eriogonum shockleyi is suspected of hybridizing with other buckwheats throughout this range. We detected higher levels of genetic diversity in E. shockleyi than in E. soredium, supporting the hypothesis that E. soredium is a derivative of E. shockleyi. We found moderate levels of admixture between the two taxa, implying the presence of incomplete reproductive barriers. Analysis of population structure revealed a genetic distinction between the two species. We found that genetic distance between samples is influenced more by taxon designation than geographic distance. Genetic evidence supports continued treatment of E. soredium as a distinct evolutionary entity.

Document Type




File Format

.fastq, .py, .txt

Viewing Instructions

see Readme file

Publication Date



Utah State University

Award Number

US Dept. of Interior, US Fish and Wildlife F17AP00091

Award Title

Determine if Eriogonum soredium is a genetically distinct species from E. shockleyi


See manuscript (currently under review)

Scientfic Names

Eriogonum soredium, Eriogonum shockleyi



Code Lists

see manuscript


Biodiversity | Bioinformatics | Evolution | Genetics and Genomics | Life Sciences | Other Ecology and Evolutionary Biology


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.


README_erisor.txt (2 kB)

erisor_code.zip (276 kB)

shockleyi_fastq_aa.zip (731288 kB)
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shockleyi_fastq_ab.zip (557613 kB)
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shockleyi_fastq_ac.zip (283143 kB)
MD5: 95de83f59d497459b3d3709022350d68

shockleyi_fastq_ad.zip (202501 kB)
MD5: 7b0bc4b051f838a677eb77b6f51c09e2

soredium_fastqs_aa.zip (546415 kB)
MD5: 2ea8f3ea7bcada633d7f1945958d6d42

soredium_fastqs_ab.zip (415071 kB)
MD5: 52f898923e9fe151c1c532e86a3d09de

soredium_fastqs_ac.zip (592809 kB)
MD5: 47d7951ec9332a96bfc32b282c6733c9

soredium_fastqs_ad.zip (645461 kB)
MD5: 711c300702bc2f601519482f9b6008bb