Genotype-by-environment interaction for seed quality traits in interspecific cross-derived Brassica lines using additive main effects and multiplicative interaction model

The aim of this study was to assess genotype by environment interaction for seed quality traits in interspecific cross-derived Brassica lines by the additive main effects and multiplicative interaction (AMMI) model. The study comprised of 25 winter rapeseed genotypes i.e.: B. napus cultivar Californium, twenty three cross-derived Brassica lines and male sterile line of an F-8 generation of B. napus (MS8), selected from resynthesized oilseed rape (B. rapa ssp. chinensisxB. oleracea var. gemmifera) using in vitro cultures of isolated embryos. Field trials were performed at three locations in 3years in a randomized complete block design, with three replicates. AMMI analyses revealed significant genotype and environmental effects as well as genotype by environmental interaction with respect to all five observed traits. The lines 16 (B. napus line MS8xB. rapa ssp. pekinensis) and 7 (B. napus line MS8xB. carinata) are recommended for further inclusion in the breeding programs because their stability and good average values of observed traits, except total glucosinolates content for line 16 (the best total genotype selection indexes were equal to 81 and 97, respectively).