The F₁ hybrid rapeseed (Brassica napus L.) exploits heterosis to deliver greater yield, stability, and uniformity than open-pollinated cultivars, making it suitable for large- scale cultivation. In Korea, cultivation is shifting from landscape and apiculture to expanding edible oil production and increasing the demand for paddy field-adapted hybrids. Using Mokpo-CGMS as the female and the pollen parent ‘09003-B-126-2-1-3,’ we developed the breeding line ‘Dangyo 80,’ which, after multi-environment evaluations of yield and oil quality against ‘Sunmang,’ was selected as a new cultivar ‘Areum. ’ ‘Areum’ exhibits growth habit type IV, yellow flowers, and a red seed coat. Its flowering and maturity times are comparable to ‘Sunmang. ’ Major growth indices did not differ significantly among cultivars; however, while ‘Areum’ showed slightly greater lodging susceptibility, it displayed higher resistance to Sclerotinia stem rot. Notably, in paddy fields ‘Areum’ achieved a higher plant density per square meter than ‘Sunmang’ which produced a 31% yield increase. In fatty acid composition, ‘Areum’ had higher oleic acid content (65% vs. 60%) and lower erucic acid (0.95% vs. 1.35%) than ‘Sunmang,’ indicating improved suitability for high-quality edible rapeseed oil production (Registration No. 9755).

‘Yuryeo’ is a rapeseed cultivar suitable for rapeseed oil production which was developed by the Bioenergy Crop Research Institute, NICS, RDA, in 2018. ‘Yuryeo,’ characterized by its high oleic acid content and resistance to sclerotinia stem rot and lodging, was developed through gamma-ray irradiation of ‘Hallayuchae’ seeds followed by pedigree breeding. Regional yield trials for ‘Yuryeo’ were conducted in three regions from 2016 to 2019. As a result, the flowering period of ‘Yuryeo’ was observed to be two days later than that of ‘Hallayuchae,’ but both had a similar maturation period. In terms of yield, there was no significant difference between ‘Yuryeo’ and ‘Hallayuchae,’ but ‘Yuryeo’ showed higher resistance to sclerotinia stem rot and lodge. Notably, the oleic acid in ‘Yuryeo’ was 74.2%, marking a 10% increase over ‘Hallayuchae.’ With its enriched oleic acid content and reliable cultivation characteristics, ‘Yuryeo’ can enhance both rapeseed cultivation and the rapeseed oil industry (Registration No. 8753).

‘Joan’, a rapeseed (Brassica napus L.) F₁ hybrid cultivar suitable for producing cooking oil developed by the National Institute of Crop Science, is early maturing with characteristically high yield and oleic acid content. It was bred in 2009 by crossing the male sterile line ‘Mokpo-CGMS’ as the female parent with the restorer line ‘8630-B-6-5-3-6’ as the male parent. The average flowering and maturation dates of ‘Joan’ were April 10^th and June 1^st, respectively, 3 and 4 days earlier, respectively, than that of the control cultivar ‘Sunmang’. The yield of ‘Joan’ obtained in regional adaptation trials was 279 kg/10 a, which is 6% higher than that obtained for ‘Sunmang’. ‘Joan’ is resistant to stem rot disease and more tolerant to lodging than ‘Sunmang’. Moreover, the total oil content of ‘Joan’ is 44.5%, whereas the oleic acid content is 69.5%, which is 2.3% higher than that of ‘Sunmang’. However, erucic acid has not been detected. ‘Joan’ can be grown in paddy fields located in Jeollanam-do, Jeollabuk-do, Gyeongsangnam-do, and Jeju-do in Korea (Registration No. 6896).

A new rapeseed (Brassica napus L.) variety ‘Jungmo 7003’ is with early flowering and disease tolerance, which has white petals. ‘Jungmo 7003’ was developed from the cross between ‘Tower’ as female parent and ‘AB130’ as male parent in 1983. The selection for advanced lines with white flower had been done by the pedigree method. A promising line, ‘83025-B-1-1-2’, was selected and designated as the name of ‘Mokpo113’. It had good results from regional adaptation yield trials at four locations for two years from 2013 to 2014 and was released as the name of ‘Jungmo 7003’. ‘Jungmo 7003’ has light-green and middle parted leaf, light-green stem and black seed coat. Since, the prominent very special trait of ‘Jungmo 7003’is white flower, it can be used for landscaping purposes created farm-art images. The flowering date of ‘Jungmo 7003’ was 16^th April and ripening date was 5^th June. The yield of ‘Jungmo 7003’ was 207 kg/10a, which was 6% lower than ‘Hanlayuchae' in regional adaptation trials. ‘Jungmo 7003’ showed high resistance to screrotium. The oil content of ‘Jungmo 7003’ was 43.8%. In fatty acid composition of ‘Jungmo 7003’, oleic acid content is 68.4%, which is 1.2% higher than ‘Hanlayuchae'. ‘Jungmo 7003’ will be adaptable to southwestern area including Jeonllanam-do, Jeollabuk-do and Gyeongsangnam-do and Jeju island of Korea.

A new rapeseed (Brassica napus L.) F₁ hybrid ‘Haean’ was crossed between ‘Mokpo-CGMS’, male sterile line and ‘8516-B-5-6-1-2’, restore line for the adaptation of paddy land culture with early maturing, disease resistant and lodging tolerance in 2008. Yield trials were conducted from 2009 to 2010 in Muan, and regional adaptation trials were examined from 2011 to 2013 in four regions. ‘Haean’ has dark green, cleft and parted leaf, light yellowish flower, and black seed color. The maturation date of ‘Haean’ is 4^th June, 4 days earlier than ‘Sunmang’. In the regional adaptation trials, average yield of ‘Haean’ was 272 kg/10a, which was 6% higher than ‘Sunmang’. Seed oil content of ‘Haean’ was 44.2%. In fatty acid composition, oleic acid content is 69.8%, which is 2.5% higher than ‘Sunmang’. Total glucosinolates content was 1.84 mg/g. ‘Haean’ has characteristics of disease resistant and lodging tolerance, this variety can be cultured at paddy lands in southwestern area including Jeonnam, Jeonbuk and Kyongnam provinces and Cheju island of Korea.

‘Jungmo 7002’ is a intermediate parent of rapeseed (Brassica napus L.) with flowering uniformity and lodging tolerance for the scenery and oil production. ‘Jungmo 7002’ was developed from the cross between ‘RS10//Erra/Tower’ as female parent and ‘RS10’ as male parent in 1984. A promising line, ‘84013-B-6-3-3-6’, was selected and designated as the name of ‘Mokpo116’. It was prominent and had good result from regional adaptation yield trials (RYT) for three years from 2011 to 2013 and was released as the name of ‘Jungmo 7002’. ‘Jungmo 7002’ has middle parted and dark-green leaf, Brownish-green stem, yellowish flower and black seed coat. The flowering date of ‘Jungmo 7002’ was 16th April and ripening date was 9th June. The yield of ‘Jungmo 7002’ was 247 kg/10a, which was 19% higher than ‘Hanlayuchae’ in regional adaptation trials. This intermediate parent showed high resistance to lodging tolerance. The oil content of ‘Jungmo 7002’ was 44.3%. In fatty acid composition of ‘Jungmo 7002’ , oleic acid content is 70.8%, which is 3.3% higher than ‘Hanlayuchae’. And ‘Jungmo 7002’ has no erucic acid. ‘Jungmo 7002’ will be adaptable to southwestern area including Jeonllanam-do, Jeollabuk-do and Gyeongsangnam-do and Jeju island of Korea.

‘Jungmo 7001’ is a intermediate parent of rapeseed (Brassica napus L.) with wide adaptable, early flowering and large flower for the scenery and production of edible oil. ‘Jungmo 7001’ was developed from the cross between ‘[(Mangun × Bronowski) × Erra] × Tower’ as female parent and ‘RS10’ as male parent in 1984. ‘Jungmo 7001’ has green and middle parted leaf, yellowish flower and black seed coat. The flowering and ripening period of ‘Jungmo 7001’ were 3 days earlier than check variety 'Hanlayuchae'. The average flower size of ‘Jungmo 7001’ was significantly greater than flowers of 'Hanlayuchae'. The average seed yield of ‘Jungmo 7001’ was higher compared with 'Hanlayuchae' in local adaptability test. Total oil content of ‘Jungmo 7001’ was 44.4%. In fatty acid composition, ‘Jungmo 7001’ has no erucic acid. However, oleic acid content is 69.1%, which is 1.7% higher than 'Hanlayuchae'. ‘Jungmo 7001’ will be adaptable to southwestern area including Jeonllanam-do, Jeollabuk-do and Gyeongsangnam-do and Jeju island of Korea.