Data and analysis for the effects of watering regime on aboveground and belowground trait covariation in a hybrid Silphium population

Data were acquired during a greenhouse experiment in which plants in large tree pots were watered from either the soil line ("top-watered") or from below using watering trays ("bottom-watered"). Plants represented a backcrossed F1 hybrid Silphium integrifolium x Silphium perfoliatum population. Aboveground biomass, root distribution, and root morphology (e.g., specific root length) were measured destructively. "silphiumGH_rootStrandScans_SUBMISSION.zip" contains three images that each represent a root strand from a plant in the experiment. Images were acquired using a flatbed scanner and used to calculate specific root length in the Rhizovision software interface. "silphiumGreenhouseDataSubmission.csv" contains all of the data used for this manuscript, including manually entered measurements and the output of Rhizovision software. "submissionAnalysisAndFigures_Ch2.R" includes all of the code necessary to analyze the data in the csv file (e.g., t-tests and robust regressions) and produce all of the data-related figures in the manuscript (excluding data tables).