Dataset and R-code associated with "Phylogenetic pattern of a clade-specific trade-off between resistance and tolerance to insect herbivory in Brassicaceae plants"

Dataset used to calculate tolarance and resistance values of 18 different plant species from the Brassicaceae family. This dataset contains caterpillar weight of <em>Pieris brassicae </em>caterpillars, feeding damage resulting from these caterpillars, leaf area of the plants, and the seed count of the plants. The experiment took place in a greenhouse at Wageningen University and Research in 2023. <br>18 plant species were challenged with caterpillars (<em>P. brassicae </em>L1s) for seven days, or with mechanical damage (either 30%, 50% or 70%). Every species-damage treatment combination was replicated 12 times (in a randomized complete block design). After completion of the damage treatments, the plants species were left in the greenhouse to flower and produce seeds. <em>Bombus terrestris</em> <em> </em>were released for pollination. Resistance was calculated as the negation of the average caterpillar weight per plant. For plant species on which all caterpillars died, a resistance value of -0.24 was assigned, based on the average weight of 10 L1 caterpillars. In addition, plant damage caused by the caterpillars was assessed using a categorial scale from 1-10, with 1 indicating zero to 10% damage and 10 indicating 90% to 100% damage. Plant damage was assessed separately for foliage and flowers and the average was used in further analyses. Tolerance was calculated as the Pearson’s correlation coefficient of the relationship between the mechanical damage and the resulting seed count of the plants .

本数据集用于计算十字花科（Brassicaceae）18个不同植物物种的耐受性与抗性值。本数据集包含菜青虫（Pieris brassicae）幼虫的体重、此类幼虫造成的取食损伤、植物叶面积以及植物结籽数。本实验于2023年在瓦赫宁根大学及研究中心（Wageningen University and Research）的温室中开展。
研究人员用菜青虫L1幼虫（P. brassicae L1s）对18个植物物种施加为期7天的虫害胁迫，或对其进行机械损伤处理（损伤比例分别为30%、50%或70%）。每个物种-损伤处理组合均设置12次生物学重复，采用完全随机区组设计。损伤处理完成后，将所有植物保留在温室中使其开花结籽，并释放熊蜂（Bombus terrestris）进行授粉。
抗性值以每株植物上幼虫平均体重的负值计算得到。对于所有幼虫均死亡的植物物种，参考10头L1幼虫的平均体重，为其赋值抗性值-0.24。此外，研究人员采用1~10分类评分体系评估虫害造成的植物损伤：1分代表损伤程度为0%~10%，10分代表损伤程度为90%~100%。需分别对叶片和花朵的损伤情况进行评分，取平均值用于后续分析。
耐受性值以机械损伤与植物最终结籽数之间的皮尔逊相关系数（Pearson’s correlation coefficient）计算得到。