Genetic variation and phenotypic plasticity in circadian rhythms in an armed beetle, Gnatocerus cornutus (Tenebrionidae)
Genetic variation and phenotypic plasticity in circadian rhythms in an armed beetle, Gnatocerus cornutus (Tenebrionidae)
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DOI：
10.1093/biolinnean/blaa016
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发表时间：
2020-05-01
影响因子：
1.9
通讯作者：
Miyatake, Takahisa
中科院分区：
文献类型：
--
作者：
Matsumura, Kentarou;Abe, Masato S.;Miyatake, Takahisa
昼夜节律，其自由运行周期和节奏的力量通常被用作生物钟的指标，并且有证据表明昼夜节律的自由运行周期不受环境因素（如温度）的影响。然而，很少有研究环境对节律的功率的影响，并且不清楚温度补偿是否是普遍的。此外，生物钟的遗传变异和表型可塑性对于理解生物节律的进化很重要，但遗传和可塑性效应很少被研究。在这里，我们使用了18 isofemale线（基因型）的Gnatocerus cornutus评估节奏的运动活动，同时也测试温度的影响。我们发现，总的活动和昼夜节律的功率受到性别和基因型之间或性别，基因型和温度之间的相互作用。雄性往往更活跃，并表现出更大的活动增加，但这种影响在基因型和温度之间存在差异。活动期仅因基因型而异，因此与温度无关。我们记录的复杂的基因型-性别-环境相互作用强调了以更综合的方式研究昼夜节律活动的重要性。
Circadian rhythms, their free-running periods and the power of the rhythms are often used as indicators of biological clocks, and there is evidence that the free-running periods of circadian rhythms are not affected by environmental factors, such as temperature. However, there are few studies of environmental effects on the power of the rhythms, and it is not clear whether temperature compensation is universal. Additionally, genetic variation and phenotypic plasticity in biological clocks are important for understanding the evolution of biological rhythms, but genetic and plastic effects are rarely investigated. Here, we used 18 isofemale lines (genotypes) of Gnatocerus cornutus to assess rhythms of locomotor activity, while also testing for temperature effects. We found that total activity and the power of the circadian rhythm were affected by interactions between sex and genotype or between sex, genotype and temperature. The males tended to be more active and showed greater increases in activity, but this effect varied across both genotypes and temperatures. The period of activity varied only by genotype and was thus independent of temperature. The complicated genotype-sex-environment interactions we recorded stress the importance of investigating circadian activity in more integrated ways.