Marie Jasieniuk

image of Marie Jasieniuk

Associate Professor


Plant Sciences

Offices and Labs

269 Robbins Hall


1985 PhD Biology McGill University

Research Contribution

Research in the Jasieniuk lab focuses on two study systems: cropland weeds evolving resistance to herbicides and invasive plants with horticultural origins. The two systems are not only ideal for basic research on processes underlying weed evolution and spread, they include some of the worst weed problems in California. Thus, our research also contributes to improving the management of economically and environmentally significant plant pests in the state.

Research Interests

Population genetics and evolution of agricultural weeds and invasive plants

The Jasieniuk lab studies the population genetics, molecular ecology, and evolution of agricultural weeds and invasive plants. Our research focuses on elucidating the genetic, demographic, and evolutionary processes underlying the introduction, establishment, and spread of weeds and invasive plants, and their adaptation to changing environments, including management practices.

Department and Center Affiliations

Plant Sciences
John Muir Institute of the Environment

CBS Grad Group Affiliations

Plant Biology

Specialties / Focus

Plant Biology
  • Systematics and Evolutionary Biology

Graduate Groups not Housed in CBS

Ecology Graduate Group
Horticulture and Agronomy Graduate Group


Jasieniuk Lab website


PLS 012 Plants and Society (Spring)
SAS 012 Plants and Society (Spring)
BIS 2B Introduction to Biology: Principles of Ecology and Evolution (Winter)
PBI 200A Plant Biology Graduate Group Core Course (Fall)


8/22/2012 2:56:43 PM
  • Clark, L.V. and M. Jasieniuk. 2012. Spontaneous hybrids between native and exotic Rubus in the Western United States produce offspring both by apomixis and by sexual recombination. Heredity, In press.
  • Firestone, J.L. and M. Jasieniuk. 2012. Seed production is reduced by small population size in natural populations of the invasive grass Lolium multiflorum. Biological Invasions, In press.
  • Clark, L.V. and M. Jasieniuk. 2011. POLYSAT: an R package for polyploid microsatellite analysis. Molecular Ecology Resources 11:562-566.
  • Kleist, A.C. and M. Jasieniuk. 2011. A molecular phylogenetic analysis of invasive and ornamental brooms and their relationships within the Genistoid legumes. Molecular Phylogenetics and Evolution 61:970-977.
  • Okada, M., M. Lyle, and M. Jasieniuk. 2009. Inferring the introduction history of the invasive apomictic grass Cortaderia jubata using microsatellite markers. Diversity and Distributions 15:148-157.
  • M. Jasieniuk, R. Ahmad, A.M. Sherwood, J.L. Firestone, A. Perez-Jones, W.T. Lanini, C. Mallory-Smith, and Z. Stednick. 2008. Glyphosate-resistant Italian ryegrass (Lolium multiflorum) in California: distribution, response to glyphosate, and molecular evidence for an altered target enzyme. Weed Science 56:496-502.
  • Okada, M., B.J. Grewell, and M. Jasieniuk. 2009. Clonal spread of Ludwigia hexapetala and L. grandiflora in freshwater wetlands of California. Aquatic Botany 91:123-129.
  • Okada, M., R. Ahmad, and M. Jasieniuk. 2007. Microsatellite variation points to local landscape plantings as sources of invasive pampas grass (Cortaderia selloana) in California. Molecular Ecology 16:4956-4971.