Data from: Constitutive metabolomic profile of a transgressive segregant of rice with superior salinity tolerance potentials due to unique morphological features and well-modulated growth

Understanding the nature of non-parental phenotypes created by
transgressive segregation is important in creating novel genetic
recombinants that can withstand different environmental conditions for
crop production. FL510, a transgressive salinity-tolerant rice genotype
from a cross between IR29 (xian/indica; salt-sensitive) and Pokkali
(indica/aus; salt-tolerant), has tolerance mechanisms active under control
conditions and improves survival upon the onset of salinity. This study
compares normal-state metabolomes and lipidomes of FL510 with those of its
parents. Principal component analysis (PCA) of the identified analytes
showed clear and expected similarity between FL510 and Pokkali, while
partial least squares discriminant analysis (PLS-DA) emphasized overlaps
between the metabolic profiles of IR29 and FL510. The analysis identified
metabolites with inherited patterns of abundance from either parent in
FL510 and those with unique, non-parental abundances, and these were
supported by differential expression of key pathway-related genes
identified through transcriptome analysis. Strigolactone precursor
production was identified as a key feature in FL510, which may help
explain its unique architecture that is beneficial for osmotic stress. We
also identified a divergence between productivity under ideal
environments, leading to free radical production versus tempered
production that offers better survival under marginal growing conditions.
FL510 showed an inheritance of hormone and amino acid abundances from
Pokkali, which further explains some of its architectural and previously
studied stress-response features. Meanwhile, the similarity of FL510 with
IR29 in terms of flavonoid indicates an inheritance of productivity and is
consistent with previous reports of induction for these molecules under
stress, rather than being active under control conditions.