Fig. 2From: Pollen-mediated gene flow from transgenic to non-transgenic switchgrass (Panicum virgatum L.) in the fieldAverage number of orange fluorescent protein (OFP)-tagged switchgrass pollen grains detected as a function of distance (Poisson regression, F1,8 = 288.38, P < 0.0001) under field conditions. Pollen grains were sampled from the eastward direction twice in 2012 and three times during the 2013 growing season (bars represent ± standard error of mean)Back to article page