Potential of apple varieties of the Ural-Siberian and Far Eastern group for use in breeding for winter hardinessNatalya Saveleva, Andrey Yushkov, Alexander Zemisov, Nadezhda Borzykh and Vladislav ChivilevE3S Web Conf., 254 (2021) 01034DOI: https://doi.org/10.1051/e3sconf/202125401034