Fitness benefits of dietary restriction.
Fitness benefits of dietary restriction.
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DOI：
10.1098/rspb.2021.1787
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发表时间：
2021-11-24
期刊：
影响因子：
--
通讯作者：
Maklakov AA
中科院分区：
文献类型：
--
作者：
Sultanova Z;Ivimey-Cook ER;Chapman T;Maklakov AA
饮食限制（DR）提高了广泛的分类群的生存率，但仍然知之甚少。目前尚未解决的关键问题是，这种对暂时缺乏食物的进化保守反应是否具有适应性。最近的研究表明，当营养物质随后变得丰富时，早期生命DR会降低生存和繁殖，从而挑战适应性解释。一个新的假说认为，DR下生存率的增加是由于过度喂养的成本降低。我们测试了DR反应的适应价值在远交种群的果蝇。我们发现，DR女性并没有遭受减少生存后，随后重新喂养，并增加了繁殖和交配成功率相比，他们的连续充分喂养（FF）的同行。DR后生殖性能的增加是足够的幅度，女性经历早期的DR有相同的总生育力连续FF个人。我们的研究结果表明，DR反应是适应性的，并增加健身时，暂时的食物短缺停止。
Dietary restriction (DR) improves survival across a wide range of taxa yet remains poorly understood. The key unresolved question is whether this evolutionarily conserved response to temporary lack of food is adaptive. Recent work suggests that early-life DR reduces survival and reproduction when nutrients subsequently become plentiful, thereby challenging adaptive explanations. A new hypothesis maintains that increased survival under DR results from reduced costs of overfeeding. We tested the adaptive value of DR response in an outbred population of Drosophila melanogaster fruit flies. We found that DR females did not suffer from reduced survival upon subsequent re-feeding and had increased reproduction and mating success compared to their continuously fully fed (FF) counterparts. The increase in post-DR reproductive performance was of sufficient magnitude that females experiencing early-life DR had the same total fecundity as continuously FF individuals. Our results suggest that the DR response is adaptive and increases fitness when temporary food shortages cease.
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