This document, by Dr. Mercy Kitavi of International Potato Center is a PDF presentation for a webinar. The training material is titled “Sweetpotato leaf preservation methods for high DNA quality, purity and yield” The colorful presentation is filled with pictures and a detailed explanation on leaf collection for high or medium throughput DNA extraction, materials to be used, details on leaf sampling, cryopreservation methods, cooling methods for temporary preservation and the dos and donts in the selection of preservation.