Determination of the optimal plant population and rapeseed genotype (Brassica napus L.) in western Iran

[摘要] This study was conducted to determine the most suitable plant population and genotype ofrapeseed at the Eslamabad-e-Gharb Research Station in western Iran during 2018-2020. Theexperiment was a factorial based on a randomized complete block design (RCBD) with threereplications. Factors included four plant populations (20, 40, 60, and 80 plants m-2), and sevengenotypes included four hybrids (Natalie, Rohan, Neptune, and Marathon) and three openpollinated cultivars (Nafis, Nima, and Nilufar). The results show that the effect of the year wassignificant for all traits due to the difference in weather parameters over the two years of theexperiment. ANOVA results shows that the effects of the plant population significantly affectedplant height, the number of branches, the number of grains per pod, grain yield, grain oil, andoil yield. The effect of the genotype was also significant for all traits except oil yield. The effectof the interaction between the plant population and genotype on plant height, the number ofbranches, the number of grains per pod, the number of pods per plant, and 1000-grain weightwas also significant. In general, open-pollinated cultivars at 60 plants m-2 and hybrid cultivarsat 40 plants m-2 had higher grain yields.

[学科分类] 农业科学（综合）

[关键词] Grain yield;oil production;plant population;rapeseed;seed rate;yield component