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Graduate Student:
Marianna Szűcs
Degree:
Ph.D.
Major: Entomology
Years at U of
I: 4 years
Email:
mariannaszucs@vandals.uidaho.edu

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Project Title:
Evolution, hybridization, landscape genetics and climatic
associations of biotypes of the biological control agent
Longitarsus jacobaeae
(Coleoptera: Chrysomelidae).
Description of project:
I am working with several biotypes of
the successful biological control agent
Longitarsus jacobaeae,
which was introduced to control the invasive weed, tansy
ragwort (Senecio
jacobaeae). This
system provides great opportunity to address several
evolutionary and ecological questions since the introduction
and spread of an organism into a new environment is well
documented.
I am conducting reciprocal transplant,
common garden and laboratory experiments to study the life
history characteristics of different
L. jacobaeae
biotypes. I am testing whether observed life history changes
in a population released to high elevations are a result of
phenotypic plasticity or rapid evolution. I am using
molecular methods to characterize native and introduced
populations of L.
jacobaeae to determine which biotypes have established
in the U.S., whether they hybridized and if certain lineages
are associated with particular climatic regimes. I am also
studying intraspecific hybrids of different
L. jacobaeae
biotypes to assess their viability and potential utility as
biocontrol agents for new infestations of tansy ragwort.
Lastly, I am
monitoring the establishment of a cold adapted biotype of
L. jacobaeae in
the Intermountain West on a recent tansy ragwort
infestation.
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