Interspecific diversity of combining ability of somatic mutations in animals

Polymorphism of interphase nucleolus organizer regions in imported pigs and their offspring

“…In a popu lation of organisms of any species, there are always small changes in genetic material and, consequently, variations in the manifestation of traits of separate individuals [2]. Precisely from these genetic varia tions, evolution selects those individuals which maxi mally increase the possibility of survival and preserva tion of the gene pool [3].…”