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Does exposure of male D rosophila melanogaster to acute gamma radiation influence egg to adult development time and longevity of F 1 – F 3 offspring?
Author(s) -
Shameer P. Mohamed,
Sowmithra K.,
Harini B. P.,
Chaubey R. C.,
Jha S. K.,
Shetty N. J.
Publication year - 2015
Publication title -
entomological science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 28
eISSN - 1479-8298
pISSN - 1343-8786
DOI - 10.1111/ens.12120
Subject(s) - longevity , biology , drosophila melanogaster , irradiation , andrology , zoology , toxicology , genetics , medicine , gene , physics , nuclear physics
Two‐ to three‐day‐old male D rosophila melanogaster flies were irradiated with 1, 2, 4, 6, 8, 10, 20, 25, 30, 40 and 50 G y doses of gamma radiation. The longevity and rate of development were observed for three successive generations to assess the impact of irradiation. The mean lifespan of irradiated flies was significantly increased at 1, 2 and 8 G y, while it was vice versa for high doses at 30, 40 and 50 G y. Paternal irradiation had an impact on F 1 generation, with significantly increased mean longevity at 2 (female), 4, 6, 8 and 10 and decreased mean longevity at 40 and 50 G y (male and female). Significant increase in the longevity was observed in the F 2 generation of the 8 (male and female) and 10 G y (male) irradiated groups, while decreased longevity was observed in F 2 female progeny at 40 G y. In the case of F 3 progeny of irradiated flies, longevity did not show significant difference with the control. Paternal exposure to radiation had a significant impact on the mean egg to adult developmental time of the F 1 generation; it was shortened at 2 G y and extended at 25, 30, 40 and 50 G y compared to the control. Mean development time at 30, 40 and 50 G y was significantly increased in the F 2 generation, while there were no significant changes in the F 3 generation. The present study concludes that the effect of acute gamma irradiation on longevity and “egg to adult” development time of D . melanogaster may persist to following generations.