THE MUTATION RATE AT SPECIFIC AUTOSOMAL LOCI IN DIFFERENT SPECIES OF DROSOPHILA. Eight Month Progress Report

Technical Report · Wed Oct 31 04:00:00 EST 1962

OSTI ID:4835371

The effects of radiation damage, as measured by mutation rates at specific visible autosomal loci, upon the male germ cells of Drosophila was studied with special emphasis upon comparative mutation rates of gametes in different stages of maturation at the time of radiation. Information on the brood patterns. and data on the kind and incidence of mutations as related to the brood patterns are summarized. A clearly defined reduction in number of offspring was found to occur in the third brood (6 to 8 days following radiation) although the number of offspring is also considerably reduced in the fourth brood. The data point to a difference in mutation patterns as well as mutation rates for the three types of mutations. The numbers are large enough for the first two broods to make it highly probable that the difference between the mutants at specific loci, and the phenotypic dominaitts is more than just a quantitative difference. In respect to the gonadal periods, it appears that the mutation rate of the Minutes may be considerably higher than of the other types of mutations. lt is also suggested that there may be a difference in mutation rates in gonadal cells in different developmental stages at the time of radiation. (P.C.H.)

• Research Organization: Turku, Finland. Univ.
• NSA Number: NSA-16-001465
• OSTI ID: 4835371
• Report Number(s): TID-13638
• Country of Publication: United States
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
GENETICS
GONADS
INSECTS
LIFETIME
MUTATIONS
RADIATION EFFECTS
RADIATION INJURIES