Evolution of short-lived and long-lived races of drosophila in the envrons of laboratory

Ranjini, M. S. and Ramachandra, N. B. (2009) Evolution of short-lived and long-lived races of drosophila in the envrons of laboratory. Indian Journal of Gerontology, 23 (4). pp. 381-398. ISSN 0971-4189

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Aging is no more an intractable process and it can be better understood by life span studies and interventions like dietary restriction in model organisms. The aim of this study was to determine the stability of lifespan in the laboratory evolved cytoraces of nasuta-albomicans complex of Drosophila. These cytoraces were subjected for the following lifespan assessments: a) three independent replicate assessments with standard food media; b) validation of short-lived and long-lived cytoraces by crossing experiments; and c) response of lifespan to dietary restriction with diluted yeast in the food media. The findings were: 1) establishment of cytoraces 3 and 15 as short-lived and cytoraces 2, 9, 11 and 16 as long-lived by three replicate lifespan assessments; 2) nonsignificant differences in lifespan of F1 offspring of shortlived as well as two long-lived crosses from their parents; 3) extension of lifespan in short-lived races, but not in long-lived races in response to dietary restriction. Thus, the evolution of new short-lived and long-lived cytoraces and their differential response to dietary restrictions could be due to rapid genomic changes that had taken place during introgression via hybridization.

Item Type: Article
Uncontrolled Keywords: Cytoraces and Dietary restriction and Hybridization and Introgression and Nasuta-albomicans complex
Subjects: B Life Science > Zoology
Divisions: Department of > Zoology
Depositing User: Users 19 not found.
Date Deposited: 13 Sep 2019 09:51
Last Modified: 13 Sep 2019 09:51
URI: http://eprints.uni-mysore.ac.in/id/eprint/8117

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