| Autor: |
Ramniwas S; Lab No. 13, Drosophila Genetics Laboratory, Maharshi Dayanand University, Rohtak-124001, Haryana, India. seema.ramniwas@gmail.com, Kajla B, Dev K, Parkash R |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of experimental biology [J Exp Biol] 2013 Apr 01; Vol. 216 (Pt 7), pp. 1244-54. Date of Electronic Publication: 2012 Dec 13. |
| DOI: |
10.1242/jeb.076166 |
| Abstrakt: |
For Drosophila melanogaster, cuticular melanisation is a quantitative trait, varying from no melanin to completely dark. Variation in melanisation has been linked with stress resistance, especially desiccation, in D. melanogaster and other species. As melanism has a genetic component, we selected melanic and non-melanic phenotypes of D. melanogaster in order to confirm the association of desiccation resistance and rate of water loss with cuticular melanisation previously reported for this species. A bidirectional selection experiment for dark (D1-D4) and light (L1-L4) body colour in D. melanogaster was conducted for 60 generations. We observed a 1.6-fold increase in abdominal melanisation in selected dark strains and a 14-fold decrease in selected light strains compared with control populations. Desiccation resistance increased significantly in the dark-selected morphs as compared with controls. The observed increase in desiccation resistance appeared as a consequence of a decrease in cuticular permeability. Our results show that traits related to water balance were significantly correlated with abdominal melanisation and were simultaneously selected bidirectionally along with melanisation. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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