A Medium Maturing New Rice Variety Suan with High Quality for Direct Seeding and Transplanting Cultivation
2013
Shin, W.C., RDA, Sangju, Republic of Korea | Ko, J.C., Rural Development Administration, Suwon, Republic of Korea | Back, M.K., RDA, Iksan, Republic of Korea | Ko, J.K., RDA, Iksan, Republic of Korea | Kim, B.K., RDA, Iksan, Republic of Korea | Nam, J.K., RDA, Iksan, Republic of Korea | Kim, W.J., RDA, Iksan, Republic of Korea | Shin, M.S., RDA, Iksan, Republic of Korea | Kang, H.J., RDA, Iksan, Republic of Korea | Ha, K.Y., RDA, Iksan, Republic of Korea | Kim, K.Y., RDA, Milyang, Republic of Korea | Park, H.S., RDA, Iksan, Republic of Korea | Son, J.Y., RDA, Suwon, Republic of Korea | Mo, Y.J., RDA, Suwon, Republic of Korea | Choi, I.B., RDA, Iksan, Republic of Korea | Kim, J.K., RDA, Suwon, Republic of Korea
Suan is a new high quality japonica rice variety developed from a cross between HR20017-B-19-3-1 and Iksan467 in 2003 by the rice breeding team of Rice Breeding and Cultivation Research Division, Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA. in 2010. Suan has about 132 days growth duration from direct seeding to harvesting in the southern plain including Chungcheong province. The heading date of Suan is August 10, faster than that of Nampyeongbyeo by 6 days at ordinary season cultivation. Culm length of Suan is about 79 cm and tiller number per hill is similar to Nampyeongbyeo and spikelet number per panicle is fewer than Nampyeongbyeo. Ripened grain rate of this variety is approximately 94.6 %, higher than Nampyeongbyeo and Suan showed higher spikelet fertility than Nampyeongbyeo by 12 % when exposed to cold stress. Suan has medium size of brown rice and is resistant to leaf blast, bacterial blight and stripe virus disease but susceptible to insect pests. The milled kernel of Suan is translucent with non-glutinous endosperm. Protein content of Suan is about 6.5%, amylose content and palatability of cooked rice is similar to Nampyeongbyeo. The milled rice yield is about 5.47 MT/ha, 9% higher under wet-direct seeding, 5.56 MT/ha, 9% higher under dry-direct seeding than Juanbyeo and 5.80 MT/ha, 4% higher under the standard fertilizer level of the ordinary transplanting cultivation when compared with Nampyeongbyeo. Suan would be adaptable for ordinary transplanting and direct seeding in the plain areas of south of Chungnam and southwest coastal district of Korea.
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