Beaver, L. M. and Gvakharia, B. O. and Vollintine, T. S. and Hege, D. M. and Stanewsky, R. and Giebultowicz, J. M. (2002) Loss of circadian clock function decreases reproductive fitness in males of Drosophila melanogaster. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 99 (4). pp. 2134-2139. ISSN 0027-8424
Full text not available from this repository. (Request a copy)Abstract
Circadian coordination of life functions is believed to contribute to an organism's fitness; however, such contributions have not been convincingly demonstrated in any animal. The most significant measure of fitness is the reproductive output of the individual and species. Here we examined the consequences of loss of clock function on reproductive fitness in Drosophila melanogaster with mutated period (per(0), timeless (tim(0)), cycle (cyc(0)), and Clock (Clk(Irk)) genes. Single mating among couples with clock-deficient phenotypes resulted in approximate to40% fewer progeny compared with wild-type flies, because of a decreased number of eggs laid and a greater rate of unfertilized eggs. Male contribution to this phenotype was demonstrated by a decrease in reproductive capacity among per(0) and tim(0) males mated with wild-type females. The important role of clock genes for reproductive fitness was confirmed by reversal of the low-fertility phenotype in flies with rescued per or tim function. Males lacking a functional clock showed a significant decline in the quantity of sperm released from the testes to seminal vesicles, and these tissues displayed rhythmic and autonomous expression of clock genes. By combining molecular and physiological approachesz, we identified a circadian clock in the reproductive system and defined its role in the sperm release that promotes reproductive fitness in D. melanogaster.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RHYTHMIC EXPRESSION; LYMANTRIA-DISPAR; LIFE-SPAN; PERIOD; GENE; TRANSCRIPTION; TIMELESS; BEHAVIOR; OSCILLATORS; MUTATIONS; |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Entwicklungsbiologie (Prof. Dr. Stephan Schneuwly) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Nov 2021 09:09 |
| Last Modified: | 09 Nov 2021 09:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40585 |
Actions (login required)
 |
View Item |
