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Title: Effect of metabolites on starvation and longevity in a natural population of Drosophila ananassae
Authors: Yadav, JP
Singh, Pallav
Keywords: Inversions;Longevity;Starvation
Issue Date: Oct-2018
Publisher: NISCAIR-CSIR, India
Abstract: Metabolites, such as lipids and carbohydrates, have pivotal roles on longevity and starvation and vary differently in natural and laboratory populations of Drosophila. A natural population of Drosophila ananassae has been subjected to starvation resistance and paraquat induced longevity in both sexes of early eclosed, old and control virgin flies and tested for carbohydrate, lipid and water contents; body size, dry weight and polymorphic inversions. Starvation resistance varies significantly (P <0.02) between males and females as the latter has more water contents than males (P <0.0002). The lipid and water contents suggest sexual dimorphism and show the metabolic trade-off for old females only. The carbohydrate contents in both sexes have significant differences among groups (P <<0.0001). The longevity is negatively correlated with body size but shows positive correlations with dry weight and starvation resistance in both sexes. Early eclosed males live longer than their females (P <0.002). The three-way nested ANOVA suggests that among groups as well as within subgroups, thorax length, starvation resistance, and longevity vary significantly (P <<0.0001) in both sexes. Correlation studies with different polymorphic gene arrangements and longevity suggest positive correlations for 2L and 3L gene arrangements and a negative correlation for 3R gene arrangement. The 3R gene arrangement is perfectly correlated with longevity in males. The 3L gene arrangement shows significant (P <0.05) positive correlation with the dry weight in females.
Page(s): 716-724
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.56(10) [October 2018]

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