Selection of Exotic Potato Genotypes for Export and Processing Purposes in Bangladesh

Six exotic potato genotypes named Actrice, Cereza, Margarita, Messi, Picobella, and Sunred, along with four check varieties, were evaluated at different locations (agroecological region) of Bangladesh in three consecutive years, 2016-17 to 2018-19 respectively to find out some stable genotypes for commercial cultivation in Bangladesh. Combined analysis of variance showed a highly significant difference among the genotypes, locations, and GEI for all the characters studied. None of the genotypes were found suitable for early harvesting (65 DAP), but when the full maturity was considered, significant variations were found for different tuber qualities and yield. During the third year, the mean highest yield was observed in Sunred (39.86 t ha-1 ), closely followed by Margarita (37.57 t ha-1 ). All the tested genotypes yielded more than 30 t ha-1 and were better than the checks. Dry matter content was the highest in the check variety Lady Rosetta (20.09%). None of the tested genotypes were better than the check varieties in dry matter content, quite unsuitable for processing. Sunred produced a very large-sized uniform and smooth tubers with a medium-high dry matter. If its dry matter content can be increased by 2-3% giving intensive agronomic management, this variety may be suitable for French Fry production. All the exotic genotypes were suitable as table potatoes. Picobella was the most stable, but the average yield is low. Considering the yield and other qualities, Sunred, Margarita, Cereza and Actrice may be further evaluated in large plots for commercial cultivation before releasing as variety.