Metabolite profiling analysis of the parental seedlings was performed as described previously (Dan et al., 2020 (link)). Briefly, untargeted metabolite profiles of 15-d-old seedlings were collected with a 1290 Infinity liquid chromatography system (Agilent Technologies, Santa Clara, CA, USA), Agilent quadrupole time-of-flight mass spectrometer (Agilent 6550 iFunnel QTOF; Agilent Technologies, Santa Clara, CA, USA), and Triple TOF 6600 mass spectrometer (AB SCIEX, Foster City, CA, USA). The metabolites were annotated using an in-house standard spectral library, and the lipids were annotated through matching with an in-house tandem mass spectrometry (MS/MS) spectral library. Data reliability was checked using a quality control sample, and the metabolite levels of a total of 3,746 detected analytes, among which 114 metabolites were annotated using the in-house spectral libraries, were normalized (sum, log, and none) for the statistical analyses.