The inheritance of phenotypes: An adaptation to fluctuating environments
The inheritance of phenotypes: An adaptation to fluctuating environments
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DOI：
10.1006/jtbi.1996.0109
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发表时间：
1996-07-07
影响因子：
2
通讯作者：
Jablonka, E
中科院分区：
文献类型：
--
作者：
Lachmann, M;Jablonka, E
我们讨论了简单的模型的自发和诱导遗传表型变异率的演变周期波动的环境与周期长度之间的两个和100代。对于最简单的情况，两个状态之间的最佳自发跃迁速率约为1/n（其中n是周期长度）。它还表明，在这些条件下的最佳转换率的选择是令人惊讶的强大。当n很小时，这意味着可遗传的变异是由非经典遗传系统产生的，包括非DNA遗传系统。因此，可以预测，在控制适应这种环境的基因中，可能会观察到非经典的遗传效应。我们认为，自发的和诱导的遗传转换的进化在单细胞和多细胞生物的个体发育的进化中发挥了重要作用。产生诱导的可遗传的表型变异的机制的存在，在进化中引入了一个“拉马克”因素。(C)1996年学术出版社
We discuss simple models for the evolution of rates of spontaneous and induced heritable phenotypic variations in a periodically fluctuating environment with a cycle length between two and 100 generations. For the simplest case, the optimal spontaneous transition rate between two states is approximately 1/n (where n is the cycle length). It is also shown that selection for the optimal transition rate under these conditions is surprisingly strong. When n is small, this means that the heritable variations are produced by non-classical inheritance systems, including non-DNA inheritance systems. Thus, it is predicted that in genes controlling adaptation to such environments, non-classical genetic effects are likely to be observed. We argue that the evolution of spontaneous and induced heritable transitions played an important role in the evolution of ontogenies of both unicellular and multicellular organisms. The existence of a machinery for producing induced heritable phenotypic variations introduces a ''Lamarckian'' factor into evolution. (C) 1996 Academic Press Limited