Effect of potato tuber bruising on gene expression 2h after mechanical shock in tetraploid potato genotypes. Effect of potato tuber bruising on gene expression 2h after mechanical shock in tetraploid potato genotypes

Tuber bruising in tetraploid potatoes (Solanum tuberosum) is a trait of economical importance, as it affects tubers' fitness for sale. Understanding the genetic components affecting tuber bruising is a key step in developing potato lines with increased resistance to bruising. As the tetraploid setting renders genetic analyses more complex, there is still a lot to learn about this complex phenotype. Here, we used genotype by sequencing data on a panel of half-sibling populations from a breeding programme to perform a genome-wide association analysis for tuber bruising. In addition, we collected transcriptomics data to enrich the GWAS results, by performing a differential expression analysis between samples with high- and low-bruising susceptibility. Overall design: Differential expression analysis of samples taken at the bruising site 2h after mechanical impact between genotypes with low and high bruising