‘Jungdream’ is an early maturing, high-quality rice cultivar developed in 2017 by the crop breeding team at Crop Research Division, GARES, Hwaseong, Korea. ‘Jungdream’ was first developed in 2008 from crossing a medium-late maturity cultivar ‘Chilbo’ and an early maturity cultivar ‘Ungwang’. The heading date of this cultivar is July 28th in the Gyeonggido Province. Its culm length is 63 cm, and it has 19 panicles per hill and 82 spikelets per panicle. It is a medium-small grain brown rice cultivar with a 1000-grain weight of 20.6 g. Its cold tolerance is lower than that of ‘Hwaseong’, which is the standard cultivar in the central region, as is its degree of lodging tolerance. ‘Jungdream’ is resistant to rice blast and stripe virus diseases but is susceptible to bacterial leaf blight and other viral diseases and pests. The appearance of milled ‘Jungdream’ rice is clear, and its amylose content is 16.5%, which is lower than that of ‘Hwaseong’. The palatability of cooked ‘Jungdream’ rice is better than that of ‘Chucheong’, which is the main cultivated crop in Gyeonggido. Its milling ratio is 75.0%, which is lower than that of ‘Hwaseong’. The yield of milled ‘Jungdream’ rice was 5.42 MT/ha in the local adaptability tests during standard cultivation in four regions from 2015 to 2017. ‘Jungdream’ is highly adaptable to the environmental conditions in the Gyeonggido Province (Registration No. 8236).
‘Jangsuheukchal’ waxy corn was developed through single-cross by Gyeonggido Agricultural Research and Extension Services in 2012. The seed parent inbred ‘GMB0016’ was crossed with the pollen parent inbred ‘GMB0017’ in 2010. ‘Jangsuheukchal’ took 72 days to silking, which was 4 days sooner than ‘Miheukchal’, and ‘Jangsuheukchal’ was 195 cm in height, which was 12 cm less than that of ‘Miheukchal’; the occurrence of lodging was low in the new species. Among the ear characteristics, the kernel setting rate was very high (99%), and the grain pericarp thickness was slightly more than that of ‘Miheukchal’, but the sensory evaluation was positive because of the high amylopectin content and the fine ear appearance. The regional yield trials were conducted in four areas for two years in 2011-2012, and the density of fresh ears for ‘Jangsuheukchal’ was determined as 62,280 ears/ha, which was 6% higher than that of ‘Miheukchal’, but the weight of the fresh ears was 9,178 kg/ha, which was 17% lighter than its counterpart. In order to diversify the use of fresh waxy corn, the cooking properties of milled waxy corns were investigated and compared to ‘Mibaek2’, which was the main cultivar in Gyeonggido province in 2018. The grain yield per ha of ‘Jangsuheukchal’ was 5,600 kg, which was 12% less than that of ‘Mibaek2’, but after harvesting fresh ears, the grain yield per ha was 1,060 kg, which was 10.6 times more than the known cultivar. In addition, compared to ‘Mibaek2’, ‘Jangsuheukchal’ showed excellent processing characteristics in the cooking properties for milled kernels because of its light 100-seed weight, low protein content, and high starch content. Therefore, we report ‘Jangsuheukchal’ as a new variety, suitable for use as a fresh corn and possessing the cooking properties of milled kernels (Registration No. 6065).
‘Gawagi1’ is an early maturing, low amylose rice variety with a medium to short culm, developed by Gyeonggi-Do Agricultural Research & Extension Services, Hwaseong, Korea in 2016. ‘Gawagi1’ was derived from the cross between ‘Baegjinju’ and ‘Sangmibyeo’ in 2004. Heading date was 4th of August 15 day earlier than ‘Baegjinju’ in Gyeonggido. The culm length was 67 cm. It had 15 panicles per hill and 104 spikelets per panicle. It is a medium-grain variety whose 1,000 grains weight of brown rice is 19.3 g. The protein content of milled rice was 6.3%, which is higher than that of ‘Baegjinju’ and its amylose content was 8.2% which is lower than that of ‘Baegjinju’. Its milling ratio is 75.5%, which is higher than that of ‘Baegjinju’. The yield of milled rice was 4.99 MT/ha under the standard cultivation practices at the local adaptability tests in 3 regions from 2014 to 2016. ‘Gawagi1’ is highly adaptable to Gyeonggido, especially to the northern region of Han River. (Registration No. 7280)
‘Chamdream’ is a medium-late maturing, high-quality rice cultivar developed in 2014 by the crop breeding team of Crop Research Division, GARES, Hwaseong, Korea, in cooperation with the rice breeding team of the National Institute of Crop Science, RDA, Korea. ‘Chamdream’ was first developed in 2004 from a backcross between the F1 hybrid ‘Samgwang/Jojeongdo’ and ‘Samgwang’ cultivar. The heading date of this cultivar is August 17th in Gyeonggido Province. Its culm length is 79 cm and it has 15 panicles per hill and 115 spikelets per panicle. It is a medium-grain brown rice cultivar with a weight of 22.9 g per 1,000 grains. Its cold tolerance is lower than that of ‘Hwaseongbyeo’ and its degree of lodging tolerance is similar to that of ‘Hwaseongbyeo’. This cultivar is resistant to bacterial leaf blight and stripe virus diseases and moderately resistant to rice blast diseases, but it is susceptible to other virus diseases and pests. The appearance of milled ‘Chamdream’ rice is clear and its protein content is 5.4%, which is lower than that of ‘Hwaseongbyeo’. The palatability of cooked ‘Chamdream’ rice is better than that of ‘Chucheongbyeo’ which is mainly cultivated in Gyeonggido. Its milling ratio is 76.8% which is higher than that of ‘Hwaseongbyeo’. The yield of milled ‘Chamdream’ rice was 5.9 MT/ha in the local adaptability tests in standard cultivation in four regions from 2012 to 2014. ‘Chamdream’ is highly adaptable to the environmental conditions of Gyeonggido Province, especially to the southern region of Han River. (Registration No. 6065)