Kirzhner V M, Korol A B, Nevo E
Institute of Evolution, University of Haifa, Israel.
Proc Natl Acad Sci U S A. 1996 Jun 25;93(13):6532-5. doi: 10.1073/pnas.93.13.6532.
Earlier we have shown that oscillations with a long period ("supercycles") may arise in two-locus systems experiencing cyclical selection with a short period. However, this mode of complex limiting behavior appeared to be possible for narrow ranges of parameters. Here we demonstrate that a multilocus system subjected to stabilizing selection with cyclically moving optimum can generate ubiquitous complex limiting behavior including supercycles, T-cycles, and chaotic-like phenomena. This mode of multilocus dynamics far exceeds the potential attainable under ordinary selection models resulting in simple behavior. It may represent a novel evolutionary mechanism increasing genetic diversity over long-term time periods.
此前我们已经表明，在经历短周期循环选择的双基因座系统中，可能会出现长周期振荡（“超级周期”）。然而，这种复杂的极限行为模式似乎只在狭窄的参数范围内才有可能出现。在此我们证明，一个受到具有周期性移动最优值的稳定选择的多基因座系统，能够产生普遍存在的复杂极限行为，包括超级周期、T 周期以及类混沌现象。这种多基因座动力学模式远远超出了普通选择模型下可能达到的简单行为。它可能代表了一种在长期时间内增加遗传多样性的新型进化机制。
