Grimsby et al 2007 knotweed sexual or clonal

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Grimsby, J.L., Tsirelson, D., Gammon, M.A. and Kesseli, R., 2007. Genetic diversity and clonal vs. sexual reproduction in Fallopia spp.(Polygonaceae). American Journal of Botany, 94(6), pp.957-964.


  • Examined genetics in 6 populations and found 26 genotypes, suggesting sexual reproduction.
  • Indicates that clonal individuals produce either male flower or female flowers, but not both on the same clone?!