The following link goes to an interactive Shiny interface designed by Y. Xing and S. Thomas-Sharma, for exploring the behavior of the seed degeneration model developed by Thomas-Sharma et al. (2017).
Thomas-Sharma, S., J. Andrade-Piedra, M. Carvajal Yepes, J. Hernandez Nopsa, M. Jeger, R. Jones, P. Kromann, J. Legg, J. Yuen, G. A. Forbes, and K. A. Garrett. 2017. A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops. Phytopathology 107:1123-1135. [open access link]