EFFECT OF ENVIRONMENT ON SEED AND OIL YIELD OF TURKISH BRASSICA RAPA L. GENOTYPES

Brassica rapa L. can provide important genetic diversity for crop improvement with rotation benefits to dryland wheat. It can also be cultivated on marginal areas and can serve as a source of biofuel production. This research aimed to determine the highest yielding genotypes for a specific environment may be useful for breeders and farmers. The yield and yield components of five pure genotypes were analysed in four environments obtained through the combination of two locations and two years of harvest in a three–replicates design. The highest and lowest mean values of the examined properties in genotypes were detected as 133.073.9 cm in plant height, 8.9–5.7 in branches plant–1, 292.4–125.3 in pods plant–1, 2.24–1.62 g in thousand seed weight, 1655.5–576.0 kg ha–1 in seed yield and 506.4–140.6 kg ha–1 in crude oil yield. Considering the performance of genotypes, the most suitable genotype in term of seed yield and crude oil yield and environment were determined as Genotype 3 (Tokat), Environment 4 (Ikizce 2018– 2019). Results of this study indicate that, the Genotype 3 can be registered as a variety for specified regions. The would be new variety or the Genotype 3 appeared to be superior in performance and stability for crude oil yield and has higher values compared to the means of other genotypes. Thus, this genotype was the best candidate variety and recommended in all of the studied environments or included in breeding programme to develop high yielding and stable genotypes.