Plasticity of maternal environment-dependent expression-QTLs of tomato seeds.
Mark G SterkenHarm NijveenMartijn van ZantenJosé Manuel Jiménez-GómezNafiseh GeshnizjaniLeo A J WillemsJuriaan RienstraHenk W M HilhorstWilco LigterinkBasten L SnoekPublished in: TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik (2023)
Seeds are essential for plant reproduction, survival, and dispersal. Germination ability and successful establishment of young seedlings strongly depend on seed quality and on environmental factors such as nutrient availability. In tomato (Solanum lycopersicum) and many other species, seed quality and seedling establishment characteristics are determined by genetic variation, as well as the maternal environment in which the seeds develop and mature. The genetic contribution to variation in seed and seedling quality traits and environmental responsiveness can be estimated at transcriptome level in the dry seed by mapping genomic loci that affect gene expression (expression QTLs) in contrasting maternal environments. In this study, we applied RNA-sequencing to construct a linkage map and measure gene expression of seeds of a tomato recombinant inbred line (RIL) population derived from a cross between S. lycopersicum (cv. Moneymaker) and S. pimpinellifolium (G1.1554). The seeds matured on plants cultivated under different nutritional environments, i.e., on high phosphorus or low nitrogen. The obtained single-nucleotide polymorphisms (SNPs) were subsequently used to construct a genetic map. We show how the genetic landscape of plasticity in gene regulation in dry seeds is affected by the maternal nutrient environment. The combined information on natural genetic variation mediating (variation in) responsiveness to the environment may contribute to knowledge-based breeding programs aiming to develop crop cultivars that are resilient to stressful environments.
Keyphrases
- genome wide
- gene expression
- dna methylation
- birth weight
- copy number
- poor prognosis
- pregnancy outcomes
- single cell
- healthcare
- high density
- arabidopsis thaliana
- high resolution
- quality improvement
- gestational age
- physical activity
- rna seq
- risk assessment
- long non coding rna
- heavy metals
- human health
- men who have sex with men
- life cycle
- weight loss
- hiv testing