Affiliation: | (1) Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada;(2) Present address: Biology Department, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada;(3) Present address: Plant Biotechnology, Alberta Research Council Inc, P.O. Bag 4000, Vegreville, Alberta, T9C 1T4, Canada |