Life history and chemical defense interact to drive patterns of adaptation in an annual monkeyflower
Life history and chemical defense interact to drive patterns of adaptation in an annual monkeyflower
复制标题
生活史和化学防御相互作用，驱动一年生猴花的适应模式
DOI：
10.1093/evolut/qpac048
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发表时间：
2022
期刊：
影响因子：
3.3
通讯作者：
Kooyers, Nicholas J.
中科院分区：
文献类型：
--
作者：
Scharnagl, Anna;Genung, Mark A.;Holeski, Liza M.;Kooyers, Nicholas J.
虽然化学防御和草食动物的压力被广泛确立为选择的关键目标和代理人，他们在当地的适应和决定潜在的进化反应，不断变化的气候的作用往往被忽视。在这里，我们探讨11范围之间的健身差异。guttatuspopulations在一个领域的共同花园实验和评估代理和目标的选择驱动相对健身模式。我们使用分段结构方程模型解开化学防御，（苯丙素苷; PPG），和生活史特征与草食动物和健身之间的关联。虽然种群的历史环境不能预测种群之间的适应性差异，但种群的开花时间和叶片PPG防御武器库可以预测>90%的适应性变化。分段结构方程模型表明，生活史性状，特别是开花时间较早，是强烈和直接的健身。然而，食草动物，特别是水果捕食，也是一个重要的选择代理，创造了健身和化学防御和生活史性状之间的间接联系。我们的研究结果强调了代理和目标的选择在生产适应的多元性，并建议未来的选择反应必须导航一个复杂的健身景观。
Although chemical defenses and herbivore pressure are widely established as key targets and agents of selection, their roles in local adaptation and determining potential evolutionary responses to changing climates are often neglected. Here, we explore fitness differences between 11 rangewideM. guttatuspopulations in a field common garden experiment and assess the agents and targets of selection driving relative fitness patterns. We use piecewise structural equation models to disentangle associations between chemical defenses, (phenylpropanoid glycosides; PPGs), and life history traits with herbivory and fitness. While the historical environment of populations is not predictive of fitness differences between populations, >90% of variation in fitness can be predicted by the flowering time and foliar PPG defense arsenal of a population. Piecewise structural equation models indicate that life history traits, particularly earlier flowering time, are strongly and directly linked to fitness. However, herbivory, particularly fruit predation, is also an important agent of selection that creates indirect links between fitness and both chemical defenses and life history traits. Our results emphasize the multivariate nature of the agents and targets of selections in producing adaptation and suggest that future responses to selection must navigate a complex fitness landscape.