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Individual reproductive success in Norway spruce natural populations depends on growth rate, age and sensitivity to temperature
Heredity ( IF 3.1 ) Pub Date : 2020-03-16 , DOI: 10.1038/s41437-020-0305-0 Camilla Avanzi 1, 2 , Katrin Heer 3 , Ulf Büntgen 4, 5, 6 , Mariaceleste Labriola 1 , Stefano Leonardi 2 , Lars Opgenoorth 5, 7 , Alma Piermattei 4 , Carlo Urbinati 8 , Giovanni Giuseppe Vendramin 1 , Andrea Piotti 1
Heredity ( IF 3.1 ) Pub Date : 2020-03-16 , DOI: 10.1038/s41437-020-0305-0 Camilla Avanzi 1, 2 , Katrin Heer 3 , Ulf Büntgen 4, 5, 6 , Mariaceleste Labriola 1 , Stefano Leonardi 2 , Lars Opgenoorth 5, 7 , Alma Piermattei 4 , Carlo Urbinati 8 , Giovanni Giuseppe Vendramin 1 , Andrea Piotti 1
Affiliation
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Quantifying the individual reproductive success and understanding its determinants is a central issue in evolutionary research for the major consequences that the transmission of genetic variation from parents to offspring has on the adaptive potential of populations. Here, we propose to distil the myriad of information embedded in tree-ring time series into a set of tree-ring-based phenotypic traits to be investigated as potential drivers of reproductive success in forest trees. By using a cross-disciplinary approach that combines parentage analysis and a thorough dendrophenotypic characterisation of putative parents, we assessed sex-specific relationships between such dendrophenotypic traits (i.e., age, growth rate and parameters describing sensitivity to climate and to extreme climatic events) and reproductive success in Norway spruce. We applied a full probability method for reconstructing parent–offspring relationships between 604 seedlings and 518 adult trees sampled within five populations from southern and central Europe. We found that individual female and male reproductive success was positively associated with tree growth rate and age. Female reproductive success was also positively influenced by the correlation between growth and the mean temperature of the previous vegetative season. Overall, our results showed that Norway spruce individuals with the highest fitness are those who are able to keep high-growth rates despite potential growth limitations caused by reproductive costs and climatic limiting conditions. Identifying such functional links between the individual ecophysiological behaviour and its evolutionary gain would increase our understanding on how natural selection shapes the genetic composition of forest tree populations over time.
中文翻译：
挪威云杉自然种群的个体繁殖成功取决于生长速度、年龄和对温度的敏感性
量化个体繁殖成功并理解其决定因素是进化研究的一个核心问题，因为遗传变异从父母到后代的传递对种群的适应潜力产生了重大影响。在这里，我们建议将树木年轮时间序列中嵌入的大量信息提炼成一组基于树木年轮的表型特征，以作为林木繁殖成功的潜在驱动因素进行研究。通过使用跨学科方法，结合亲子分析和假定父母的彻底树状表型特征，我们评估了这些树状表型特征（即年龄、生长速度和描述对气候和极端气候事件敏感性的参数）之间的性别特异性关系，以及挪威云杉繁殖成功。我们应用全概率方法重建了来自南欧和中欧 5 个种群中的 604 棵幼苗和 518 棵成年树之间的亲子关系。我们发现，雌性和雄性个体的繁殖成功率与树木的生长速度和年龄呈正相关。雌性繁殖成功率也受到生长与前一个生长季节平均温度之间的相关性的积极影响。总体而言，我们的结果表明，尽管繁殖成本和气候限制条件造成了潜在的生长限制，但健康度最高的挪威云杉个体仍能够保持高生长率。识别个体生态生理行为与其进化增益之间的功能联系将增加我们对自然选择如何随着时间的推移塑造林木种群遗传组成的理解。
更新日期：2020-03-16
中文翻译：
挪威云杉自然种群的个体繁殖成功取决于生长速度、年龄和对温度的敏感性
量化个体繁殖成功并理解其决定因素是进化研究的一个核心问题，因为遗传变异从父母到后代的传递对种群的适应潜力产生了重大影响。在这里，我们建议将树木年轮时间序列中嵌入的大量信息提炼成一组基于树木年轮的表型特征，以作为林木繁殖成功的潜在驱动因素进行研究。通过使用跨学科方法，结合亲子分析和假定父母的彻底树状表型特征，我们评估了这些树状表型特征（即年龄、生长速度和描述对气候和极端气候事件敏感性的参数）之间的性别特异性关系，以及挪威云杉繁殖成功。我们应用全概率方法重建了来自南欧和中欧 5 个种群中的 604 棵幼苗和 518 棵成年树之间的亲子关系。我们发现，雌性和雄性个体的繁殖成功率与树木的生长速度和年龄呈正相关。雌性繁殖成功率也受到生长与前一个生长季节平均温度之间的相关性的积极影响。总体而言，我们的结果表明，尽管繁殖成本和气候限制条件造成了潜在的生长限制，但健康度最高的挪威云杉个体仍能够保持高生长率。识别个体生态生理行为与其进化增益之间的功能联系将增加我们对自然选择如何随着时间的推移塑造林木种群遗传组成的理解。
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