Kirzhner V M, Korol A B, Nevo E
Institute of Evolution, University of Haifa, Haifa, 31905, Israel.
J Theor Biol. 1998 Feb 7;190(3):215-25. doi: 10.1006/jtbi.1997.0547.
Here we demonstrate that complex limiting behaviour (supercycles and chaotic-like phenomena) may arise in a rather broad and natural class of multilocus systems, both haploid and diploid, experiencing stabilizing selection with cyclically varying optima over a short period. These include loci with purely additive, dominant, or semidominant effects, with different types of their chromosome distribution. The observed complex dynamics appeared to manifest a certain stability with respect to disturbances of parameters specifying the structure of the selected system and environmental characteristics. This mode of multilocus dynamics by far exceeds the potential attainable under ordinary selection models resulting in simple behaviour. It may represent a novel evolutionary mechanism increasing genetic diversity over long time periods. This novel mechanism could contribute to the observation that biological diversity has increased over geological time regardless of the well-known massive extinctions.
在此我们证明，在经历短期最优值周期性变化的稳定选择的相当广泛且自然的多基因座系统类别中，包括单倍体和二倍体系统，可能会出现复杂的极限行为（超循环和类混沌现象）。这些系统包括具有纯加性、显性或半显性效应的基因座，以及不同类型的染色体分布。观察到的复杂动态似乎对于指定所选系统结构和环境特征的参数扰动表现出一定的稳定性。这种多基因座动态模式远远超过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时间内增加遗传多样性的新型进化机制。这种新机制可能有助于解释为何尽管存在众所周知的大规模物种灭绝，但生物多样性在地质时期仍有所增加这一现象。
