Dr. R. Joel Duff

Dr. R. Joel Duff

Title: Professor
Dept/Program: Biology
Office: ASEC C305
Phone: 330-972-6077
Fax: 330-972-8445
Email: rjduff@uakron.edu
Website: http://www.uakron.edu/biology/faculty-staff/faculty-pages/duff-laboratory.dot
Curriculum Vitae: Download in PDF format


My students and I are involved in a number of projects using molecular genetic tools to investigate organismal and genetic biodiversity. From taxonomic and phylogenetic approaches to studying species and populations to whole community genetic diversity to working on signaling pathways in whales our projects involve an integrative approach to research.


1995. Ph.D. – Molecular systematics and evolution. University of Tennessee, Knoxville, Department of Botany.
Dissertation: Restriction site variation and structural analysis of the chloroplast DNA of Isoetes in North America. Advisor: Dr. Edward E. Schilling.

1991. M.S. - Botany. University of Tennessee, Knoxville, Department of Botany.
Thesis: An electrophoretic study of two closely related species of Isoetes L. from the southern Appalachians. Advisor: Dr. A. Murray Evans.

1989. B.S. - Biology. Calvin College, Grand Rapids, Michigan.

Selected Publications

Wood, A. J. and R. J. Duff. 2009 (March). The aldehyde dehydrogenase (ALDH) gene superfamily of the moss Physcomitrella patens and the algae Chlamydomonas reinhardtii and Osteococcus tauri. The Bryologist. 112(1): 1-11.

Ford, C.S, K. L. Ayres, N. Toomey, N. Haider, J. Van Alphen Stahl, L.J. Kelly, N. Wikstrom, P.M. Hollingsworth, R. J. Duff, S. B. Hoot, R. S. Cowan, M.W. Chase, M.J. Wilkinson. 2009 (Jan). Selection of candidate coding DNA barcoding regions for use on land plants. Bot. J. Linnean Soc. 159: 1-11.

R. Joel Duff. 2008 (Sept). Flood geology’s abominable mystery. Perspect. Sci. Christ. Faith. 60(3): 162-171.

Renzaglia, K. S., J. C. Villarreal A., and R. Joel Duff. 2008 (December). New insights into morphology, anatomy, and systematics of hornworts. In “Bryophyte Biology, Vol II” (Eds. Shaw and Goffinett). 2008. Cambridge MA.

R. Joel Duff, H. Ball, and P. J. Lavrentyev. 2008 (July). Application of combined morphological-molecular approaches to the identification of planktonic protists from environmental samples. J. Eukaryot. Microbiol. 55(4): 306-312.

Duff, R. Joel., J. C. Villarreal, D. C. Cargill, and K. S. Renzaglia. 2007. Progress and challenges toward developing a phylogeny and classification of the hornworts. The Bryologist

Duff. R. Joel, Benvenuto, C. Branch T and S.C. Weeks. 2007. DNA extraction from resting cysts of the conchostracan shrimp Eulimnadia texana (Crustacea, Banchiopoda, Spinicaudata). Journal Crustacean Biology, 27: 154-157.

Qiu, Yin-Long, …R. J. Duff. et al. 2006. The Deepest Divergences in Land Plants Inferred from Phylogenomic Evidence. PNAS 103(42): 15511-15516.

Liu, Q, R. J. Duff, B. Liu, A. Wilson, S. Babb-Clendenon, J Francl, and J. Marrs. 2006. Expression of cadherin10, a type II classic cadherin gene, in the nervous system of the embryonic zebrafish. Gene Expression Patterns.

R. Joel Duff. 2006. Divergent RNA editing frequencies in hornwort mitochondrial nad5 sequences. Gene 366: 285-291.

R. Joel Duff and Francisco Moore. 2005. Pervasive RNA Editing Inferred among Hornwort rbcL transcripts except Leiosporoceros. Journal of Molecular Evolution. 61: 571-578.

Duff, R. Joel, C. Cargill, J. C. Villarreal and K. S. Renzaglia. 2004. Phylogenetic relationships of the hornworts based on rbcL sequence data: novel relationships and new insights. Monographs of the Annals Missouri Botanical Garden. 98: 41-58.

Research Accomplishments

Reed, Sadie K., R. Joel Duff, and Stephen C. Weeks. 2015. "A systematic study of the genus Eulimnadia." Journal of Crustacean Biology 35, no. 3 (2015): 379-391.

Ball, Hope C., Madeline Stavarz, Jonathan Oldaker, Sharon Usip, Richard L. Londraville, John C. George, Johnannes GM Thewissen, and Robert Joel Duff. "Seasonal and Ontogenetic Variation in Subcutaneous Adipose Of the Bowhead Whale (Balaena mysticetus)." The Anatomical Record (2015).

S. C. Weeks, C. Benvenuto, S.K. Reed, R. J. Duff, Z. –H. Duan, P. David. 2014 (Oct). A field test of a model for the stability of androdioecy in the freshwater shrimp, Eulimnadia texana. Journal of Evolutionary Biology, 27. 2080-2095. doi: 10.1111/jeb.12459

Prokop, Jeremy W., Cameron Schmidt, Donald Gasper, Robert J. Duff, Amy Milsted, Takeshi Ohkubo, Hope C. Ball et al. "Discovery of the elusive leptin in birds: identification of several ‘missing links’ in the evolution of leptin and its receptor." PloS one 9, no. 3 (2014): e92751.

Londraville, R. L. Y. Macotela, R. J. Duff, M. Easterling, Q. Liu, and E. J. Crespi. 2014 (February). Comparative endrocrinology of leptin: Assessing function in a phylogenetic context. General and Comparative Endrocrinology. Feb 2014. http://dx.doi.org/10.1016/j.ygcen.2014.02.002

Brantner, J.S., Ott, D.W., Duff, R.J., Sanoamuang, L., Simhachalam, G.P., Babu, K.K.S., & Weeks, S.C. 2013 (March). Androdioecy and hermaphroditism in five species of clam shrimp (Crustacea: Branchiopoda: Spinicaudata) from India and Thailand. Invertebrate Biology, 132(1): 27-37.

Branter, J.S., D. W. Ott, R. J. Duff, J. I. Orridge, J. R. Waldman, and S. C. Weeks. 2013 (January). Evidence of selfing hermaphroditism in the clam shrimp Cyzicus gynecia (Branchiopoda: Spinicaudata). Journal Crustacean Biology 33(2): 184-190.

Ball HC, Holmes RK, Londraville RL, Thewissen JGM, Duff RJ. 2013 (January) Leptin in Whales: Validation and Measurement of mRNA Expression by Absolute Quantitative Real-Time PCR. PLoS ONE 8(1): e54277. doi:10.1371/journal.pone.0054277