Induced gynogenesis as potential tool for detection of receive deleterious mutations carriers salmonids fishery . 8 rainbow trout females were tripped and the eggs were subjected to induced gynogenesis procedure. Approximately half of 3 female’s progeny showed type of malformations occasionally observed in rainbow trout stock kept in Rutki Station. The case study describes the potential usefulness of gynogenesis as breeding test to reveal carriers of harmful recessive alleles.