Studies on the ecology of insects sterilized artificially (gamma radiation), 8. Experimental analysis of the sexual competitiveness between normal males of the oriental fruit fly and males sterilized by the /sup 137/Cs gamma radiation
Kiyoku, M; Tsukuda, R [Okayama Univ. (Japan). Faculty of Agriculture]
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; FRUIT FLIES; RADIOSTERILIZATION; PEST CONTROL; STERILE MALE TECHNIQUE; BIOLOGICAL RADIATION EFFECTS; DOSE RATES; DOSE-RESPONSE RELATIONSHIPS; GAMMA RADIATION; IRRADIATION; MALES; PUPAE; STERILITY; SURVIVAL CURVES; ANIMALS; ARTHROPODS; BIOLOGICAL EFFECTS; ELECTROMAGNETIC RADIATION; FLIES; INSECTS; INVERTEBRATES; IONIZING RADIATIONS; RADIATION EFFECTS; RADIATIONS; STERILIZATION; 560156* - Radiation Effects on Animals- Pest Control- (-1987)
Gamma-ray irradiation of 7 KR from /sup 137/Cs on the oriental fruit fly pupae two days before emerging did not significantly reduce the percentage of emergence and longevity of adult flies. However, highly sterile adults (more than 98.9%) were found in those combinations, S..gamma.. x N/sup -/, N..gamma.. x S/sup -/ and S..gamma.. x S/sup -/. The result of observation of sperm activity in spermathecae of females mated with sterilized males showed that the sterility is caused by dominant lethalities. The sexual competitiveness between S..gamma.. and N..gamma.. has been examined in experiments of S..gamma.. x N..gamma.. x N/sup -/. (1) The data suggest that the sterility percentage concerning with egg hatchability is proportional to the rate of sterilized males replaced for normal males when that is expressed with a multiple of the ratio of normal males to normal females. Seven such straight lines thus obtained made us possible to find the theoretical expectation of sterility percentage. (2) Relationship between the percent egg hatch observed (y), or that estimated theoretically (Y), and logarithm of ratio, S..gamma../N..gamma.. (x) was showed to be two straight regression equations, y=18.413-11.952 (x - 1.295) and Y=11.890-15.462 (x - 1.295). Ratio of regression coefficients of the equations was 0.772. (3) Correlations between the sterility percentage and ratio, S..gamma../N..gamma.., showed in three convex curves under three degrees of competitiveness (0.265, 0.576 and 1.001). When both the values of S..gamma../N..gamma.. in the mating experiments and the sterility percentages are given, it is possible to obtain degrees of competitiveness using the curves.
Japan
1974-09-01
Japanese
Journal Article
Journal Name: Okayama Daigaku Nogakubu Gakujutsu Hokoku; (Japan); Journal Volume: 44
Medium: X; Size: Pages: 1-8
Journal ID: CODEN: ODNGA
INIS; AIX-07-244462; EDB-76-077020
2010-12-30
7344969