Fluctuating asymmetry, fecundity and development time in Drosophila: is there an association under optimal and stress conditions?
Fluctuating asymmetry, fecundity and development time in Drosophila: is there an association under optimal and stress conditions?
复制标题
果蝇的波动不对称性、繁殖力和发育时间：在最佳条件和应激条件下是否存在关联？
DOI：
10.1046/j.1420-9101.2002.00359.x
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发表时间：
2002
影响因子：
2.1
通讯作者：
A. Hoffmann
中科院分区：
文献类型：
--
作者：
R. Woods;C. Sgrò;M. Hercus;A. Hoffmann
许多研究报道了双侧形态特征的波动不对称（FA）与个体适合度特征之间的显著负相关，但几乎所有这些研究都是基于使用单性状FA估计的小样本量而未被复制的。因此，我们在多重复实验设计中测试了果蝇五种双边性状的FA与繁殖力和发育时间之间是否存在关系。胁迫处理是为了增加性状的可变性，并测试性状之间的关联是否受到环境变化的影响。在5天内，羽翼性状的大小与平均繁殖力呈显著正相关，且在不同的胁迫处理下，这种关系更强。没有发现任何性状的FA和平均繁殖力之间的关联。羽翼性状尺寸与发育时间呈显著正相关，羽翼性状FA与发育时间无显著相关。与模态表型相比，极端不对称表型的平均繁殖力和发育时间没有差异。这些结果与文献中提出的FA可用于估计个体适应度的建议进行了讨论。
A number of studies have reported a significant negative association between fluctuating asymmetry (FA) of bilateral morphological traits and individual fitness traits, but almost all of these are unreplicated and based on small sample sizes using single trait estimates of FA. We therefore tested if there was a relationship between the FA of five bilateral traits and fecundity and development time in Drosophila in a multiple replicated experimental design. Stressed treatments were included to increase the variability of traits and to test whether associations among traits were affected by changes in the environment. Significant positive relationships were found between the size of wing characters and mean fecundity for the 5‐day period and this relationship tended to be stronger in the stress treatments. No association was found between FA and mean fecundity for any of the traits measured. Similarly, a significant positive relationship was detected between wing trait size and development time but no association was detected between trait FA and development time. There were no differences between mean fecundity or development time of extreme asymmetry phenotypes compared with modal phenotypes. These results are discussed with reference to suggestions in the literature that FA can be used to estimate individual fitness.