Blending of animal colour patterns by hybridization.

Blending of animal colour patterns by hybridization.
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DOI:
10.1038/ncomms1071
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发表时间:
2010-09-07
影响因子:
16.6
通讯作者:
Kondo, Shigeru
Kondo, Shigeru
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Miyazawa, Seita;Okamoto, Michitoshi;Kondo, Shigeru

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长期以来,生物学家一直对动物颜色图案的惊人多样性着迷。尽管人们对此很感兴趣,但导致其丰富多样性的潜在进化和发育机制在很大程度上仍不清楚,特别是在脊椎动物中看到的生动而复杂的颜色模式。在这里,我们展示了复杂和伪装的动物标记可以通过简单的颜色图案的“混合”来形成。一个数学模型预测,具有反转斑点模式的动物之间的杂交(例如,“暗背景上的光斑”和“浅色背景上的黑斑”)必然会导致杂交后代具有伪装的迷宫图案作为“混合”的中间表型。我们通过对天然和人工杂交鲑鱼的实证检验,证实了模型预测的广泛适用性。我们的结果表明,这是一种未知的进化过程,可能是导致颜色模式多样性和杂交物种形成的机制之一。许多动物有复杂的身体模式,在一些物种中是固定的,在另一些物种中是灵活的。在这里,使用反应-扩散数学模型,结合鲑鱼杂交,中间模式被证明发生在具有不同灵活模式的交配物种所产生的杂交动物中。
Biologists have long been fascinated by the amazing diversity of animal colour patterns. Despite much interest, the underlying evolutionary and developmental mechanisms contributing to their rich variety remain largely unknown, especially the vivid and complex colour patterns seen in vertebrates. Here, we show that complex and camouflaged animal markings can be formed by the 'blending' of simple colour patterns. A mathematical model predicts that crossing between animals having inverted spot patterns (for example, 'light spots on a dark background' and 'dark spots on a light background') will necessarily result in hybrid offspring that have camouflaged labyrinthine patterns as 'blended' intermediate phenotypes. We confirmed the broad applicability of the model prediction by empirical examination of natural and artificial hybrids of salmonid fish. Our results suggest an unexplored evolutionary process by means of 'pattern blending', as one of the possible mechanisms underlying colour pattern diversity and hybrid speciation. Many animals have complex body patterns, which are fixed in some species and flexible in others. Here, using reaction-diffusion mathematical models, together with salmonid fish crosses, intermediate patterns are shown to occur in hybrid animals produced by mating species with different flexible patterns.
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