Assessment of the quality of seeds formed in situ and ex situ as a mandatory element of maintaining seed banks of rare plantsLyudmila Kavelenova, Nataly Roguleva, Nikolay Yankov, Irina Ruzaeva, Elena Pavlova, Darya Nakrainikova and Nikolay PotrachovE3S Web Conf., 265 (2021) 05012DOI: https://doi.org/10.1051/e3sconf/202126505012