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首页> 外文期刊>Oceanographic Literature Review >Genetic differences in thermal tolerance among colonies of threatened coral Acropora cervicornis: Potential for adaptation to increasing temperature
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Genetic differences in thermal tolerance among colonies of threatened coral Acropora cervicornis: Potential for adaptation to increasing temperature

机译：受威胁珊瑚Acropora Cervicornis菌落中热耐受性的遗传差异：适应温度的潜力

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Climate change is resulting in warmer temperatures that are negatively impacting corals. Understanding how much individuals within a population vary in their thermal tolerance and whether this variation is heritable is important in determining whether a species can adapt to climate change. To address this, Acropora cervicornis fragments from 20 genetically distinct colonies collected from the Coral Restoration Foundation Tavernier nursery (Florida, USA) were kept at either ambient (28 1C) or elevated (32 1C) temperatures, and mortality was monitored for 26 d. Both broad-sense (H2) and narrow-sense (h2) heritability of thermal tolerance were estimated to determine the amount of genetic variation underlying survival to elevated temperature. To understand the physiological basis of thermal tolerance, tissue from both treatments was taken 12 h after the start of the experiment to investigate gene expression at the mRNA and protein level between tolerant and susceptible colonies. Results revealed that this population has considerable total genetic variation in thermal tolerance (H 2 = 0.528), but low variance in relatedness among colonies prevented us from making any conclusions regarding h2. Despite high transcriptomic variability among and within colonies, 40 genes were consistently and significantly different between tolerant and susceptible colonies, and could be potential biomarkers for thermal tolerance should they be verified in a larger sample. Overall, the results suggest that this population has substantial genetic variation for traits that directly impact thermal tolerance; however, their response to projected increases in temperature will depend on more precise estimates of the additive components of this variation (h2).
机译：气候变化导致温暖的温度，对珊瑚产生负面影响。了解人口中的个体在其热容差异中变化，并且这种变异是遗义在确定物种是否适应气候变化方面是重要的。为了解决这一目标，从珊瑚恢复基础Tavernier托儿所（佛罗里达州，USA）收集的20个遗传患者的宫颈癌片段在环境（28 1℃）或升高（32 1℃）的温度下，监测26天的死亡率。据估计，宽视（H2）和狭义（H2）热耐受耐热性的可遗传性，以确定遗传变异的量以升高的温度升高。为了了解热耐受性的生理基础，在实验开始后，从两种治疗中的组织进行12小时，以研究耐受性和易感菌落之间mRNA和蛋白质水平的基因表达。结果表明，该群体具有相当大的热耐受性总遗传变异（H 2 = 0.528），但菌落之间的相关性的低差异阻止了我们对H2进行了任何结论。尽管在菌落中具有高的转录组变异性，但在耐受性和易感菌落之间始终如一地且显着差异，并且可以是潜在的热耐受的潜在生物标志物，如果它们在更大的样品中验证。总体而言，结果表明，该群体具有直接冲击热耐受性的特性的大量遗传变异;然而，它们对温度的增加的响应将取决于该变异的添加剂组分的更精确估计（H2）。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2202-2202|共1页
  • 作者

    K. Yetsko; M. Ross; A. Bellantuono;

  • 作者单位

    Department of Biology University of North Florida Jacksonville FL 32224 United States;

    Department of Biology University of North Florida Jacksonville FL 32224 United States;

    Department of Biology University of North Florida Jacksonville FL 32224 United States;

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