Geographical variation in AdhF and alcoholic resource utilization in Indian populations of Drosophila melanogaster |
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Authors: | RAVI PARKASH DEV KARAN ASHOK K MUNJAL |
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Institution: | Genetics Research Laboratory, Department of Biosciences, Maharshi Dayanand University, Rohtak-124 001, India.;Department of Bioscience and Biotechnology, Banasthali Vidyapith, Banasthali-304 022, India |
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Abstract: | Indian geographical populations of Drosophila melanogaster, collected at latitude 10–32.3 oN, longitude 76.1–80.1 oE and altitude 16–2050 m, were analysed for changes in Adh 1 frequency and utilization potential of diverse alcoholic resources. Until now, there have been limited data on climatic association of correlated changes on these aspects in continental populations of D. melanogaster. Indian populations demonstrate an increase in Adh F frequency by 0.04 per degree latitude and significantly higher utilization of ethanol (9.0–15.2%), acetic acid (8.1–12.5%), n-propanol (2.55-4.25%), 2-propanol (1.5-3.5%), n-butanol (2.15 3.5%) and 2-butanol (0.68-1.2%). Data also revealed significant correlation with latitude as well as altitude. Regression analysis of climatic data from collection sites confirmed the observed clinal variation of Adh F as well as alcoholic utilization in D. melanogaster. On the Indian subcontinent, variation in Adh F frequency and alcoholic resource utilization along increasing latitude as well as altitude are due to climatic selection factors such as temperature and rainfall. |
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Keywords: | AdhF clines alcoholic resources climatic selection Drosophila melanogaster Indian populations thermal amplitude |
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