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Allometric relationships shape foreleg evolution of long‐legged oil bees (Melittidae: Rediviva )
Evolution ( IF 3.1 ) Pub Date : 2020-12-27 , DOI: 10.1111/evo.14144
Annalie Melin 1, 2 , Res Altwegg 3 , John C Manning 1, 4 , Jonathan F Colville 3
Affiliation  

Exaggerated traits of pollinators have fascinated biologists for centuries. To understand their evolution, and their role in coevolutionary relationships, an essential first step is to understand how traits scale allometrically with body size, which may reveal underlying developmental constraints. Few pollination studies have examined how traits can adaptively diverge despite allometric constraints. Here, we present a comparative study of narrow-sense static and evolutionary allometry on foreleg length and body size of oil-collecting bees. Concurrently, we assess the relationship between scaling parameters and spur lengths of oil-secreting host flowers. Across species and populations, we found low variation in static slopes (nearly all <1), possibly related to stabilizing selection, but the static intercept varied substantially generating an evolutionary allometry steeper than static allometry. Variation in static intercepts were explained by changes in body size (∼28% species; ∼68% populations) and spur length (remaining variance: ∼36% species; ∼94% populations). The intercept-spur length relationship on the arithmetic scale was positive but forelegs did not track spur length perfectly in a one-to-one relationship. Overall, our study provides new insights on how phenotypic evolution in the forelegs of oil-collecting bees is related to the variability of the allometric intercept and adaptation to host plants. This article is protected by copyright. All rights reserved.

中文翻译:

异速生长关系塑造长腿油蜂的前腿进化(蜂科:Rediviva)

几个世纪以来,传粉者的夸张特征一直让生物学家着迷。要了解它们的进化以及它们在共同进化关系中的作用,重要的第一步是了解特征如何随体型异速生长,这可能揭示潜在的发育限制。很少有授粉研究检查性状如何在异速生长限制下适应性地分化。在这里,我们提出了狭义静态和进化异速生长对采油蜜蜂前腿长度和体型的比较研究。同时,我们评估了缩放参数与分泌油的寄主花的支链长度之间的关系。在物种和种群中,我们发现静态斜率的变化很小(几乎都 <1),可能与稳定选择有关,但是静态截距变化很大,产生比静态异速生长更陡峭的进化异速生长。静态截距的变化可以通过体型(~28% 物种;~68% 种群)和支线长度(剩余方差:~36% 物种;~94% 种群)的变化来解释。算术尺度上的截距-骨刺长度关系是正的,但前腿在一对一的关系中不能完美地跟踪骨刺长度。总的来说,我们的研究提供了关于采油蜜蜂前肢表型进化如何与异速生长截距和对寄主植物适应的变异性相关的新见解。本文受版权保护。版权所有。∼68% 种群)和支线长度(剩余方差:∼36% 物种;∼94% 种群)。算术尺度上的截距-骨刺长度关系是正的,但前腿在一对一的关系中不能完美地跟踪骨刺长度。总的来说,我们的研究提供了关于采油蜜蜂前肢表型进化如何与异速生长截距和对寄主植物适应的变异性相关的新见解。本文受版权保护。版权所有。∼68% 种群)和支线长度(剩余方差:∼36% 物种;∼94% 种群)。算术尺度上的截距-骨刺长度关系是正的,但前腿在一对一的关系中不能完美地跟踪骨刺长度。总的来说,我们的研究提供了关于采油蜜蜂前肢表型进化如何与异速生长截距和对寄主植物适应的变异性相关的新见解。本文受版权保护。版权所有。我们的研究提供了关于采油蜜蜂前肢表型进化如何与异速生长截距和对寄主植物适应的变异性相关的新见解。本文受版权保护。版权所有。我们的研究提供了关于采油蜜蜂前肢表型进化如何与异速生长截距和对寄主植物适应的变异性相关的新见解。本文受版权保护。版权所有。
更新日期:2020-12-27
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