Graduate Assistantship
Mercer and McHale Laboratories at Ohio State University
QTL for drought tolerance in chile pepper from Mexico and the US

Application deadline:
December 13 for domestic students and Nov 30 for international students

We are seeking a highly motivated PhD student interested in studying the 
adaptive genetic variation found in improved and landrace varieties of crops, 
as well as their wild relatives, collected from centers of origin. The 
successful candidate will be part of a USDA funded project and co-advised by 
Drs. Kristin Mercer and Leah McHale at Ohio State University in the Department 
of Horticulture and Crop Science (http://hcs.osu.edu/) in Columbus, Ohio.  
Briefly, Dr. Mercer studies plant evolutionary ecology within agricultural 
systems, including adaptation in and evolution of crop diversity in centers of 
origin.  Dr. Leah McHale studies breeding and genetics, including the 
identification and characterization of beneficial alleles for food quality and 
resistance to abiotic and biotic stresses.  You can look at our various 
research projects on our lab websites here 
(https://mercerlab.cfaes.ohio-state.edu/) and here 
(https://mchalelab.cfaes.ohio-state.edu/).

In this Mexico-US collaborative project on chile pepper (Capsicum), we aim to 
relate phenotypic, molecular, and climatic variation to understand how patterns 
of genetic variation have been shaped by the environment.  The successful 
candidate's project will use QTL analysis to highlight regions of the genome 
controlling environmental adaptation using greenhouse and laboratory 
experiments.  Such analysis will enhance our understanding of mechanisms of 
adaptation to abiotic stress, especially drought. Students with an interest in 
international collaboration are especially encouraged to apply and a facility 
with Spanish is a plus, but not required.

Outside of our labs, there are many collaborators at OSU that can contribute to 
your graduate training.  The Department of Horticulture and Crop Science has 
other faculty with interests in the ecology and evolution (or adaptation) of 
agricultural plants, as well as faculty with a molecular focus who investigate 
the genetic basis for ecologically and agronomically relevant traits.  
Similarly, there are collaborating faculty in other departments at OSU, 
including Plant Pathology, Entomology, Molecular Genetics, Evolution, Ecology, 
and Organismal Biology, and Geography, who can enhance your experience.  
Interdisciplinary programs, such as the Center for Applied Plant Science (CAPS) 
and the Agroecosystem Management Program (AMP), exist to further broaden 
opportunities.  Strong collaborators with scientists at institutions in Mexico 
and Hawaii extend our network to the south and west.

Applicants will apply for the PhD program and should have a MS in a related 
field or strong prior research experience (undergraduate thesis, technician 
position, etc.).  There are fellowship opportunities through the College of 
Food, Agriculture, and Environmental Sciences and Graduate School, so high 
quality applications will be forwarded accordingly.  We encourage students to 
consider concurrently applying to external fellowship funding sources.

Please contact us directly if you are interested in the position.  Please 
include a description of your interests, as well as an updated CV with GPA, 
GRE, and TOEFL scores, as relevant.  GRE scores should be expressed as a 
percentage.  Kristin Mercer, [email protected]<mailto:[email protected]>, 
614-247-6394.  Leah McHale, [email protected]<mailto:[email protected]>, 
614-292-9003.

Further information can be found on the Future Graduate Students page for 
Horticulture and Crop Science 
(https://hcs.osu.edu/future-students/future-graduate-students).  For specifics 
on applying to OSU, please visit the Graduate School website 
(https://gradsch.osu.edu/programs-admissions/admissions and 
http://gpadmissions.osu.edu/grad/quick-guide.html).  Regina Vann 
([email protected]<mailto:[email protected]>), Graduate Studies Coordinator, can also 
be of assistance.



Kristin Mercer, Associate Professor
Ohio State University
Department of Horticulture and Crop Science

202 Kottman Hall
2021 Coffey Rd.
Columbus, Ohio 43210

614-247-6394
[email protected]<mailto:[email protected]>
http://mercerlab.cfaes.ohio-state.edu/


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