Dupas Stéphane, Morand Serge, Eslin Patrice
Laboratoire Populations, Génétique et Evolution, CNRS, 91198 Gif-sur-Yvette, France.
C R Biol. 2004 Feb;327(2):139-47. doi: 10.1016/j.crvi.2004.01.003.
We explore two possible hypotheses about the ecological factors driving the evolution of hemocyte load in insects. The first is parasite infection risk, its variability and the genetic diversity of parasites. The other supposes that all the other factors of environmental stress drive the evolution through a pleiotropic selection on metabolic rate. The two hypotheses are tested with data on hemocyte load and ecology of six Drosophila species of the melanogaster subgroup. Hemocyte load correlates significantly with the parasite-driven selection index, but not with the stress selection index. The result being based on too little data to conclude definitely, this work must be considered more as a methodological research based on published results on insect physiology immunity and ecology rather than an empirical evidence of such a relationship.
我们探讨了关于驱动昆虫血细胞负载量进化的生态因素的两种可能假设。第一种是寄生虫感染风险、其变异性以及寄生虫的遗传多样性。另一种假设是，所有其他环境压力因素通过对代谢率的多效性选择来驱动进化。我们用黑腹果蝇亚组的六种果蝇的血细胞负载量和生态学数据对这两种假设进行了检验。血细胞负载量与寄生虫驱动的选择指数显著相关，但与压力选择指数无关。由于该结果所基于的数据太少，无法得出明确结论，因此这项工作更应被视为基于已发表的昆虫生理免疫和生态学结果的方法学研究，而非这种关系的实证证据。
