Differences in the selection response of serially repeated color pattern characters: standing variation, development, and evolution.
Differences in the selection response of serially repeated color pattern characters: standing variation, development, and evolution.
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DOI：
10.1186/1471-2148-8-94
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发表时间：
2008-03-26
影响因子：
3.4
通讯作者：
Brakefield PM
中科院分区：
文献类型：
--
作者：
Allen CE;Beldade P;Zwaan BJ;Brakefield PM
在自然界中有壮观的形态多样性，但谱系通常显示有限的表型范围。由于发育过程产生了促进自然选择的表型变异，它们可能是进化偏差的来源，促进了一些变化，限制了其他变化。虽然在发展调节的变化与类群之间的形态差异，目前还不清楚如何影响选择下的人口内的进化变化的速度和方向的基本机制。在这里，我们专注于两个生态相关的功能，蝴蝶翅膀的颜色图案，眼点大小和颜色组成，这是类似的，强烈相关的连续重复的眼点。尽管这两个性状在种群内表现出相似的立位变异和协变模式，但它们在潜在发展的关键特征上有所不同。我们有针对性地对眼点进行人工选择，协调（协同选择）与独立（拮抗选择）的颜色组成和大小的变化，并比较两种颜色模式字符的进化反应。这两个字符响应选择在惊人的不同方式，尽管最初相似的模式，在所有方向的变化存在于初始人口。大小（由扩散感应信号的局部性质决定）在所有选定的方向上灵活地演变。然而，颜色组成（由对信号浓度梯度的组织水平响应确定）仅在协调变化的方向上演变。有没有独立的进化变化的颜色组成的两个眼点在拮抗选择。此外，这些差异的方向的短期进化变化的眼点大小和颜色组成在一个单一的物种是一致的，观察到的翅膀图案的多样性属。这两个字符迅速响应选择协调的变化，但有显着的差异，他们的反应选择拮抗，独立的变化跨越眼点。虽然许多其他因素可能有助于短期和长期的进化反应，我们认为，分区的发展过程可以影响多样化的连续重复序列，如蝴蝶眼点，即使在强选择。
There is spectacular morphological diversity in nature but lineages typically display a limited range of phenotypes. Because developmental processes generate the phenotypic variation that fuels natural selection, they are a likely source of evolutionary biases, facilitating some changes and limiting others. Although shifts in developmental regulation are associated with morphological differences between taxa, it is unclear how underlying mechanisms affect the rate and direction of evolutionary change within populations under selection. Here we focus on two ecologically relevant features of butterfly wing color patterns, eyespot size and color composition, which are similarly and strongly correlated across the serially repeated eyespots. Though these two characters show similar patterns of standing variation and covariation within a population, they differ in key features of their underlying development. We targeted pairs of eyespots with artificial selection for coordinated (concerted selection) versus independent (antagonistic selection) change in their color composition and size and compared evolutionary responses of the two color pattern characters. The two characters respond to selection in strikingly different ways despite initially similar patterns of variation in all directions present in the starting population. Size (determined by local properties of a diffusing inductive signal) evolves flexibly in all selected directions. However, color composition (determined by a tissue-level response to the signal concentration gradient) evolves only in the direction of coordinated change. There was no independent evolutionary change in the color composition of two eyespots in response to antagonistic selection. Moreover, these differences in the directions of short-term evolutionary change in eyespot size and color composition within a single species are consistent with the observed wing pattern diversity in the genus. Both characters respond rapidly to selection for coordinated change, but there are striking differences in their response to selection for antagonistic, independent change across eyespots. While many additional factors may contribute to both short- and long-term evolutionary response, we argue that the compartmentalization of developmental processes can influence the diversification of serial repeats such as butterfly eyespots, even under strong selection.
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影响因子：
2.9
作者：
Beldade, P;Brakefield, PM
通讯作者：
Brakefield, PM
影响因子：
64.8
作者：
Beldade, P;Brakefield, PM;Long, AD
通讯作者：
Long, AD
影响因子：
3.3
作者：
ATCHLEY, WR;COWLEY, DE;HAWKINSBROWN, D
通讯作者：
HAWKINSBROWN, D
影响因子：
2.9
作者：
Brakefield, P. M.;Roskam, J. C.
通讯作者：
Roskam, J. C.
影响因子：
3.3
作者：
CHEVERUD, JM
通讯作者：
CHEVERUD, JM