Maternal adjustment of egg size organizes alternative escape behaviors, promoting adaptive phenotypic integration.
Maternal adjustment of egg size organizes alternative escape behaviors, promoting adaptive phenotypic integration.
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母体对卵子大小的调整组织了替代的逃避行为，促进了适应性表型整合。
DOI：
10.1111/j.1558-5646.2010.00941.x
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
B. Sinervo
中科院分区：
文献类型：
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作者：
L. Lancaster;A. McAdam;B. Sinervo
许多综合性状有助于生物体性能的任何方面，但有利的性状组合很难在基因重组面前保持。我们调查了母性效应在促进整合的替代生殖策略（喉咙的颜色）与反捕食者的特征（逃避行为和背部图案）在侧斑点蜥蜴（Uta stansburiana）的作用。以前，我们报告说，母体衍生的雌二醇适应性配对背图案与后代喉色。在这里，我们显示了适应性母性效应对每个喉色变体内的逃避行为。具体而言，黄喉女性和所有女性交配黄喉公驴产下更大的鸡蛋。较大的卵产生更健壮的后代，他们一生都保持更健壮。囤积会促进逃避行为（例如，而黄毛鼠的后代则是黄毛鼠的后代。橙喉雌性产卵较小，产生更瘦的孵化谁执行垂直逃跑行为（例如，跳跃）。垂直行为提高条纹，橙喉后代的生存。逃跑行为是不可遗传的，但由自然或实验鸡蛋大小的变化。母体对适应性表型整合的影响在多态物种中可能很常见，因为重组会破坏有益的性状组合。此外，我们的研究结果提供了深入了解身体形状的作用，在组织（和约束）的综合生殖和antipredator战略的演变。
Numerous integrated traits contribute to any aspect of organismal performance, but favorable trait combinations are difficult to maintain in the face of genetic recombination. We investigated the role of maternal effects in promoting integration of alternative reproductive strategies (throat colors) with antipredator traits (escape behaviors and dorsal patterns) in the side-blotched lizard (Uta stansburiana). Previously, we reported that maternally derived estradiol adaptively pairs dorsal patterns with progeny throat colors. Here we show adaptive maternal effects on escape behaviors within each throat color morph. Specifically, yellow-throated females and all females mated to yellow-throated sires lay larger eggs. Larger eggs produce stockier offspring, who remain stockier throughout life. Stockiness promotes evasive escape behaviors (e.g., reversals), which are adaptive in barred, yellow-throated offspring. Orange-throated females lay smaller eggs, producing leaner hatchlings who perform vertical escape behaviors (e.g., jumping). Vertical behaviors enhance survival in striped, orange-throated progeny. Escape behavior was not heritable, but was organized by natural or experimental egg size variation. Maternal effects on adaptive phenotypic integration are likely common in polymorphic species, because recombination otherwise breaks apart beneficial trait combinations. Furthermore, our results provide insight into the role of body shape in organizing (and constraining) evolution of integrated reproductive and antipredator strategies.