title: Cytogenetic polymorphism of seed progeny of walnut (Juglans regia L.) during introduction in the Central Chernozem Region
abstract: We studied the cytogenetic characteristics of the seed progeny of the walnut (Juglans regia L.) trees introduced to and grown within the territory of the Central Russian Upland. Three seedling groups with polymorphic cytogenetic characteristics were revealed: mutable (with a high level of pathological mitoses), low mutable (with a low level of cytogenetic disturbances), and intermediate groups. Cytogenetic characteristics (mitotic activity, parts of cells at various stages of mitosis, the level 
journal: Notulae Botanicae Horti Agrobotanici Cluj-Napoca