Phenotypic divergence among threespine stickleback that differ in nuptial coloration
Phenotypic divergence among threespine stickleback that differ in nuptial coloration
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三刺刺鱼的表型差异在婚配颜色上有所不同
DOI：
10.1002/ece3.6105
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发表时间：
2020
影响因子：
2.6
通讯作者：
R. Tinghitella
中科院分区：
文献类型：
--
作者：
Clara S Jenck;Whitley R Lehto;B. Ketterman;Lukas F. Sloan;Aaron N. Sexton;R. Tinghitella
通过研究系统分化的最早阶段，我们可以了解种群内部和种群之间的进化力量，以及这些力量如何导致生殖隔离。这样的理解将有助于我们更好地辨别和预测选择如何导致物种内多种变体的维持，而不是物种形成。冰后期适应性辐射的threespine棘鱼（Gasterosteus aculeatus）是进化多样化和快速，重复物种形成的最佳研究案例之一。冰消期后，海洋棘鱼不断入侵北方的淡水栖息地，并建立了与海洋祖先无数次分离的居民种群。独立的淡水殖民活动产生了大致平行的模式，淡水和海洋刺鱼的形态差异。然而，在淡水种群内部和之间也有许多表型多样性。我们研究了在华盛顿西南部发现的一个不太知名的淡水“物种对”，在那里，许多地方的雄性棘鱼已经失去了祖先的红色性信号，而是发展出黑色的婚姻色彩。我们测量了一系列性状的表型变异，这些性状跨越了红色和黑色棘鱼分布不重叠的地点，以及它们历史上共同发生的一个地点。我们发现红色和黑色变体在非颜色性状（包括形状和侧板）中存在显著的表型差异，并发现支持感觉驱动假说的证据，该假说是负责颜色从红色到黑色的进化开关的机制。一个新描述的第三个“混合”变形在康纳溪，华盛顿，不同的头部形状和大小的红色和黑色的变形，我们认为，他们的特点是最一致的溯河产卵和淡水刺鱼之间的杂交。这些结果奠定了基础，为今后的调查潜在的遗传基础，这种表型的分歧，以及进化过程中，可能会驱动，维持，或限制变种之间的分歧。
Abstract By studying systems in their earliest stages of differentiation, we can learn about the evolutionary forces acting within and among populations and how those forces could contribute to reproductive isolation. Such an understanding would help us to better discern and predict how selection leads to the maintenance of multiple morphs within a species, rather than speciation. The postglacial adaptive radiation of the threespine stickleback (Gasterosteus aculeatus) is one of the best‐studied cases of evolutionary diversification and rapid, repeated speciation. Following deglaciation, marine stickleback have continually invaded freshwater habitats across the northern hemisphere and established resident populations that diverged innumerable times from their oceanic ancestors. Independent freshwater colonization events have yielded broadly parallel patterns of morphological differences in freshwater and marine stickleback. However, there is also much phenotypic diversity within and among freshwater populations. We studied a lesser‐known freshwater “species pair” found in southwest Washington, where male stickleback in numerous locations have lost the ancestral red sexual signal and instead develop black nuptial coloration. We measured phenotypic variation in a suite of traits across sites where red and black stickleback do not overlap in distribution and at one site where they historically co‐occurred. We found substantial phenotypic divergence between red and black morphs in noncolor traits including shape and lateral plating, and additionally find evidence that supports the hypothesis of sensory drive as the mechanism responsible for the evolutionary switch in color from red to black. A newly described third “mixed” morph in Connor Creek, Washington, differs in head shape and size from the red and black morphs, and we suggest that their characteristics are most consistent with hybridization between anadromous and freshwater stickleback. These results lay the foundation for future investigation of the underlying genetic basis of this phenotypic divergence as well as the evolutionary processes that may drive, maintain, or limit divergence among morphs.
DOI：
10.1073/pnas.0308479101
发表时间：
2004-03-09
影响因子：
11.1
作者：
Wexler, NS
通讯作者：
Wexler, NS
三刺刺鱼的祖先可塑性和异速生长揭示了与衍生的淡水生态型相关的表型。
DOI：
10.5061/dryad.hb824gd4
发表时间：
2012
期刊：
Biological journal of the Linnean Society. Linnean Society of London
影响因子：
--
作者：
Wund,MatthewA;Valena,Sophie;Wood,Susan;Baker,JohnA
通讯作者：
Baker,JohnA