Developmental plasticity associated with early structural integration and evolutionary patterns: Examples of developmental bias and developmental facilitation in the skeletal system.,Evolution and Development

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Developmental plasticity associated with early structural integration and evolutionary patterns: Examples of developmental bias and developmental facilitation in the skeletal system.
Evolution and Development ( IF 2.6 ) Pub Date : 2019-10-14 , DOI: 10.1111/ede.12323
Kathryn Kavanagh ₁

Affiliation

The relation of developmental plasticity to evolutionary diversification is a key component of evolutionary theory involving developmental bias, but the basis of the relationship varies among traits and among taxa. Here I review some scenarios of how structural integration during early organogenesis could influence this relationship. When condensations are highly integrated and dependent on each other during early organogenesis, both plasticity and evolution are restricted, for example size proportions in molar tooth rows and phalanges within a digit. When similar condensations develop and remain separate (in tracheal cartilages and feather buds), they show high levels of variation and diversity in number but not in shape and size, at least at early stages. When non‐similar structures form separately and then integrate while still undergoing patterning, high levels of plasticity (in number, size, shape; in rib uncinate processes) or new dimensions of ecologically‐significant variation (cusp offset, in mammal teeth) are seen. Although each of these structural integration scenarios is unique, the modulation of evolvability is detectable and informative. Parsing the influence of structural integration at these developmental levels, rather than later‐stage structural correlations or only through genetic covariation, may be necessary to advance understanding of evolvability of the phenotype.

中文翻译：

与早期结构整合和进化模式相关的发育可塑性：骨骼系统中发育偏差和发育促进的例子。

发育可塑性与进化多样化的关系是涉及发展偏差的进化理论的关键组成部分，但这种关系的基础因性状和分类群而异。在这里，我回顾了一些有关早期器官发生过程中结构整合如何影响这种关系的方案。当凝结高度整合并在早期器官发生过程中相互依赖时，可塑性和演化都受到限制，例如，臼齿排和趾骨中的大小比例在一个手指内。当类似的凝结形成并保持分离时（在气管软骨和羽芽中），至少在早期阶段，它们在数量上表现出高水平的变异和多样性，但在形状和大小上却没有。当非相似的结构分开形成然后在仍然进行构图的情况下整合时，会看到高水平的可塑性（在数量，大小，形状；肋骨不成核的过程中）或新的具有生态学意义的变异尺寸（尖齿偏移，在哺乳动物牙齿中）。尽管这些结构集成方案中的每一个都是唯一的，但是可演化性的调制是可检测的且可提供信息。可能需要解析结构整合在这些发育水平上的影响，而不是后期的结构相关性或仅通过遗传协变，以增进对表型可进化性的了解。尽管这些结构集成方案中的每一个都是唯一的，但是可演化性的调制是可检测的且可提供信息。可能需要解析结构整合在这些发育水平上的影响，而不是后期的结构相关性或仅通过遗传协变，以增进对表型可进化性的了解。尽管这些结构集成方案中的每一个都是唯一的，但是可演化性的调制是可检测的且可提供信息。可能需要解析结构整合在这些发育水平上的影响，而不是后期的结构相关性或仅通过遗传协变，以增进对表型可进化性的了解。

更新日期：2019-10-14

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