[Types, frequency and interchromosomal distribution of radiation-induced chromosome rearrangements in the malaria mosquito Anopheles messeae].

Inseminated females of A. messeae caught from their natural population (Kolarovo, Tomsk) were X-ray-irradiated (1, 2 and 3 kR, 100R/min). Salivary gland chromosomes of larvae F1 were used to detect any aberrations induced. The great number of chromosomal aberrations was obtained. The inversions were more frequent (paracentric - 41.0% pericentric - 33.1%), that translocations (25.2%). A single deletion (0.7%) was found. The distribution of 304 breaks induced was studied. Frequencies of breaks in different chromosomes are in a strong proportion to the relative lengths of autosomal arms. The number of breaks in sex chromosomes was less frequent than expected.