Stability of potato clones resistant to potato virus Y under subtropical conditions

Abstract Brazilian potato production is based on cultivars originating from the USA and Europe; however, these were developed under different environmental conditions than those found in Brazil. The aim of this study was to evaluate adaptability stability 18 clones (MLG), by Universidade Federal de Lavras, four six environments state Minas Gerais, following traits evaluated: marketable tuber yield (MTY), specific gravity (SG), appearance (TA). Clones, environments, genotype × environment interaction had significant effects all traits. GGE-biplot explained 71.78, 98.13, 62.86 % sum squares G+G×E for MTY, SG, TA, respectively. Three MLG higher stability, as well better performance, cultivars, making them good candidates release cultivars.