有哪些信誉好的足球投注网站adaptation to abundant low quality food improves the ability to compete for limited rich food in drosophila melanogaster适应大量低质量食品提高了竞争能力有限的油腻的食物在果蝇.pdfVIP
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adaptation to abundant low quality food improves the ability to compete for limited rich food in drosophila melanogaster适应大量低质量食品提高了竞争能力有限的油腻的食物在果蝇
Adaptation to Abundant Low Quality Food Improves the
Ability to Compete for Limited Rich Food in Drosophila
melanogaster
Roshan K. Vijendravarma*, Sunitha Narasimha, Tadeusz J. Kawecki
Department of Ecology and Evolution, University of Lausanne, Switzerland
Abstract
The rate of food consumption is a major factor affecting success in scramble competition for a limited amount of easy-to-
find food. Accordingly, several studies report positive genetic correlations between larval competitive ability and feeding
rate in Drosophila; both become enhanced in populations evolving under larval crowding. Here, we report the experimental
evolution of enhanced competitive ability in populations of D. melanogaster previously maintained for 84 generations at
low density on an extremely poor larval food. In contrast to previous studies, greater competitive ability was not associated
with the evolution of higher feeding rate; if anything, the correlation between the two traits across lines tended to be
negative. Thus, enhanced competitive ability may be favored by nutritional stress even when competition is not intense,
and competitive ability may be decoupled from the rate of food consumption.
Citation: Vijendravarma RK, Narasimha S, Kawecki TJ (2012) Adaptation to Abundant Low Quality Food Improves the Ability to Compete for Limited Rich Food in
Drosophila melanogaster. PLoS ONE 7(1): e30650. doi:10.1371/journal.pone.0030650
Editor: Thomas Flatt, Vetmeduni Vienna Institute of Population Genetics, Austria
Received November 18, 2011; Accepted December 22, 2011; Published January 24, 2012
Copyright: 2012 Vijendravarma et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Funding: This study
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