Data from: Heterosis is common and inbreeding depression absent in natural populations of Arabidopsis thaliana ...

• Main Authors: Oakley, Christopher G., Lundemo, Sverre, Ågren, Jon, Schemske, Douglas W.
• Format: Dataset
• Language: English
• Published: Dryad 2020
• Subjects: Arabidopsis thaliana; Genetic distance; Holocene; Heterosis; Fennoscandia
• Online Access: https://dx.doi.org/10.5061/dryad.2fb36bc; https://datadryad.org/stash/dataset/doi:10.5061/dryad.2fb36bc

The importance of genetic drift in shaping patterns of adaptive genetic variation in nature is poorly known. Genetic drift should drive partially recessive deleterious mutations to high frequency, and inter‐population crosses may therefore exhibit heterosis (increased fitness relative to intra‐population crosses). Low genetic diversity and greater genetic distance between populations should increase the magnitude of heterosis. Moreover, drift and selection should remove strongly deleterious recessive alleles from individual populations, resulting in reduced inbreeding depression. To estimate heterosis, we crossed 90 independent line pairs of Arabidopsis thaliana from 15 pairs of natural populations sampled across Fennoscandia, and crossed an additional 41 line pairs from a subset of 4 of these populations to estimate inbreeding depression. We measured lifetime fitness of crosses relative to parents in a large outdoor common garden (8448 plants in total) in central Sweden. To examine the effects of genetic ... : Fennoscandian_Heterosis_At_Growout_DataField fitness data from the common garden growout to estimate heterosis and inbreeding depression. Note that the final analysis was based on line-cross type means. Columns are as follows: 1. set (between population crosses for heterosis, within population crosses for inbreeding depression), 2&3 poppair and linepair (the pair of populations and lines crossed with the format dam_sire) - See table S1 for geographic information for each population, 4. x_type (cross type: cross, maternal self or paternal self). 5. Tray (spatial block in the common garden - because each line-cross type combination was represented a maximum of 1 time in each tray, the line-cross type means were averaged over trays which is why this term does not appear in the ANOVA models presented in the paper, 6. Fruit_inclzeros (this is our estimate of cumulative fitness as total number of fruits produced, with a value of zero for plants that died or failed to reproduce).RADreads_1.tar2b-RAD sequence ...