Two field experiments were conducted for rapeseed crop (Brassica napus L.) during two winter successive seasons 2018-2019, 2019-2020 at AL-Hamdanea location which is far Mosul city about (30km). Each experiment was conducted according to factorial experiment in randomized completely block design with three replications. Its included three plant population (111.110, 166.666 and 333.332 plants. hectar-1) with three genotypes of rapeseed crop (Talayeh, Okapi and Rainbow).
The results could be summarized as:
The plant population of 111.110 plants. hectar-1 gave the highest mean for characters stem diameter, number of primary branches, number of silique /plant, leaf area, number of seed per silique, weight of thousand seed, and oil, protein percentage in 2018-2019, 2019-2020 seasons, While the plant population of 333.332 plants. hectar-1 gave a high mean for plant height in both growing seasons.
The genotypes differed significantly in all the related characteristics, the Okapi genotype come over the other genotypes in plant height, stem diameter, number of branches/plant, leaf area, number of silique/plant, number of seed/silique, 1000 seeds weight (g.) seed yield (ton.ha-1), oil, protein percentage of seeds and oil, protein yield (ton.ha-1) in both growing seasons. The interaction between plant population and genotypes was significant in plant height in both growing seasons.