Effect of Temperature on Longevity and Productivity in Drosophila Ananassae: Evidence for Adaptive Plasticity and Trade-Off Between Longevity and Productivity
Effect of Temperature on Longevity and Productivity in Drosophila Ananassae: Evidence for Adaptive Plasticity and Trade-Off Between Longevity and Productivity
复制标题
温度对果蝇寿命和生产力的影响：适应性可塑性以及寿命和生产力之间权衡的证据
作者：
S. Sisodia;B. N. Singh
在实验室中，体型对温度的遗传反应为表型可塑性提供了一个有趣的例子。我们发现，在18°C环境下饲养至成年的雌性果蝇体重明显高于25°C环境下饲养的雌性果蝇。在一定温度下，饲养温度与试验温度相同时，早期生产力和终身生产力最高。试验温度对总生产力和早期生产力的影响非常显著。试验温度和发育温度之间的交互作用也非常显著。发育温度对其影响不显著。在18°C条件下饲养的雌鱼体重较大，但其产量不显著高于25°C条件下饲养的小雌鱼。因此，当饲养温度导致体型变化时，通常体型与繁殖力之间的密切关系就消失了。这些发现为菊苣的适应性可塑性提供了证据。我们还发现了长寿和生产力之间的负相关（权衡），这是第一次报道这种长寿和生产力之间的权衡。
The genetic response of body size to temperature in the laboratory provides an interesting example of phenotypic plasticity. We found that females of Drosophila ananassae reared to adulthood at 18°C showed significant increase in body weight as compared to females reared at 25°C. At a given temperature, early productivity and lifetime productivity were the highest when the rearing and test temperature were the same. The effect of test temperature was highly significant for total productivity and early productivity. The interaction between test temperature and development temperature was also highly significant. Effect of development temperature was not significant. The females reared at 18°C showed greater body weight but their productivity was not significantly higher than smaller females reared at 25°C. Thus, the usually close relationship between size and fecundity is lost when the size change is due to rearing temperature. These findings provide evidence for adaptive plasticity in D. ananassae. We also found a negative correlation (trade-off) between longevity and productivity, the first report of such a trade-off between longevity and productivity in D. ananassae.