Heiko C. Becker

TL;DR: It was concluded that epistasis together with all levels of dominance from partial to overdominance is responsible for the expression of heterosis in rapeseed.

TL;DR: The results indicate that for closely correlated traits conditional QTL mapping can be used to dissect the genetic interrelationship between two traits at the level of individual QTL and can reveal additional QTL with small effects that are undetectable in unconditional mapping.

TL;DR: Two large doubled-haploid mapping populations and two corresponding sets of backcrossed test hybrids were analysed in controlled greenhouse experiments and extensive field trials for seedling biomass and yield performance traits, respectively, indicating regulatory loci that may also contribute to fixed heterosis in the highly duplicated B. napus genome.

TL;DR: A marker assisted selection to recombine positive alleles from European and Chinese material is a powerful approach to further increase the oil content of rapeseed, but epistatic effects and genotype × environment interactions have to be considered.

TL;DR: Accessions with potential genes of interest to improve earliness, yield components and oil and protein contents have been identified and increasing protein in high-glucosinolate genotypes reduced oil content and should be more efficient in genotypes of low-gloucesterolate genetic background.