The Ice-Cap method allows one to grow plants in 96-well plates and non-destructively harvest root tissue from each seedling. DNA extracted from this root tissue can be used for genotyping reactions. We have found that Ice-Cap works well for Arabidopsis thaliana, tomato, and rice seedlings.
Su, S., Clark, K. A., Gibbs, N. M., Bush, S. M., Krysan, P. J. Ice-Cap: A Method for Growing Arabidopsis and Tomato Plants in 96-well Plates for High-Throughput Genotyping. J. Vis. Exp. (57), e3280, doi:10.3791/3280 (2011).