‘Nokwoo’, a mid-late maturing, high dry matter yielding rice (Oryza sativa L.) cultivar with a good early growth and low-temperature germinability, was developed for whole crop silage (WCS) use. It was derived from a cross between a leafy tropical japonica ‘LK1A-2-12-1-1’ with high biomass and good germinability in low temperature and new plant type (NPT), ‘IR72225-29-1-1’ which had low tillering trait, large panicle, dark green leaf, thick and sturdy stem and vigorous root system. This cultivar had about 123 days growth period from seeding to heading, 122㎝ culm length, 29㎝ panicle length, 9 panicles per hill, 144 spikelets per panicle and 1,000-grain weight of 24.4 g as brown rice in central plain region, Suwon. This wide and long leafy WCS rice variety was weak to cold stresses similar to ‘Nokyang’ but was a little resistant to lodging in the field, strong to viviparous germination and good to low temperature germination. In addition, ‘Nokwoo’ was resistant to leaf and neck blast but susceptible to bacterial blight, rice stripe virus and brown planthopper. Its average dry matter yield for three years reached 16.5 MT/ha, 14% higher than that of ‘Nokyang’. This cultivar had 5.3% crude protein and 68.8% total digestible nutrients a little low compared to ‘Nokyang’. In Korea peninsular, ‘Nokwoo’ grows well in central and southern plain and is good to harvest between 15 to 30 days after heading to improve its feeding value and digestion rate of livestock (Grant No. 6072).

‘Jungmo1038', a mid-late maturing, high dry matter yielding rice (Oryza sativa L.) cultivar with glabrous leaf and hull, was developed for whole crop silage (WCS) use. It was derived from a cross between ‘SR24592-HB2319’ with high biomass, smooth leaf and hull and good germinability in low temperature and new plant type (NPT), ‘IR73165-B-6-1-1‘ which had low tillering trait, large panicle, dark green leaf, thick and sturdy stem and vigorous root system. This cultivar had about 125 days growth period from seeding to heading, 99㎝ culm length, 20㎝ panicle length, 13 panicles per hill, 119 spikelets per panicle and 1,000-grain weight of 23.3 g as brown rice in central plain region, Suwon. This hairless WCS rice variety was weak to cold stresses similar to ‘Nokyang’ but was resistant to lodging in the field, strong to viviparous germination and good to low temperature germination. In addition, ‘Jungmo1038’ was resistant to leaf and neck blast but susceptible to bacterial blight, rice stripe virus and brown planthopper. Its average dry matter yield for three years reached 17.2 MT/ha, 21% higher than that of ‘Nokyang’. This glabrous cultivar had 6.6% crude protein and 62.4% total digestible nutrients a little low compared to ‘Nokyang’. In Korea peninsular, 'Jungmo1038' grows well in central and southern plain and is good to harvest between 15 to 30 days after heading to improve its feeding value and digestion rate of livestock(Grant No. 5634).

Low temperature is a major abiotic stress that adversely affects rice production in rice cultivation regions of the world. Low temperature during the rice growing season, can inhibit growth and development at any development stage, from germination to grain filling. Among the rice growth stage, reproductive stage was known as the most sensitive to low temperature, causing sterile grain and lead yield loss. However, low temperature during the grain filling stage also, may cause delay and incomplete grain maturation. In this study QTL analysis were performed to identify the QTLs associated with percent of grain filling under low temperature condition during the grain filling stage. A 139 RIL derived from a cross between ‘Milyang23’ (Tong-il, cold susceptible) and ‘Gihobyeo’(Japonica, cold tolerance) were exposed to air and water of 17℃ at the same time for 14 days during the grain filling stage. One significant QTL associated to percent of grain filling was detected on chromosome 7. This QTL could explain 14.7% of the phenotypic variance for percent of grain filling. We have the plan to confirm the detected QTL through further study.

‘Jungmo1029’, a late-maturing, high biomass and multiple disease resistant rice (Oryza sativa L.) cultivar, was developed for whole crop silage (WCS) use. It was derived from a cross between ‘Gillim collection1’ with high biomass and ‘Junam’ which has some of diseases resistant genes. This elite cultivar had about 127 days growth period from seeding to heading, 105 cm culm length, 11 panicles per hill, 163 spikelets per panicle and 1,000-grain weight of 21.5 g as brown rice. This WCS rice variety was weak to cold stresses similar to ‘Nokyang’ but was tolerant to lodging in the field. In addition, ‘Jungmo1029’ was resistant to leaf and neck blast, bacterial blight except race K3a and rice stripe virus but susceptible to brown planthopper. Its average dry matter yield for three years reached 17.1 MT/ha, 14% higher than that of ‘Nokyang’. This stay green cultivar had good quality for WCS with low acid detergent fiber and high total digestible nutrients similar to ‘Nokyang’.‘Jungmo1029’ was suitable for cultivation in the central and southern plain area of the South Korean peninsula and required to harvest 15~30 days after heading to improve the digestibility of cattle (Registration No. 5104).

조숙 내병 고품질 찰벼를 육성할 목적으로 2000년 하계에 조숙 내도열병 내도복성인 SR20261-5-4-10 계통을 모본으로 조생찰벼인 진부찰을 인공교배하여 SR26688-1-2-2 계통을 선발하여 철원77호로 계통명을 부여하였다. 2008～2010년 3 개년 간 지역적응시험 실시결과 그 우수성이 인정되어 2010 년 12월 직무육성 신품종 선정위원회에서 국가목록등재 품종 으로 선정됨과 동시에 ‘청백찰’로 명명되었다. ‘청백찰’의 출 수기는 보통기 재배에서 평균 출수기가 7월27일로 ‘오대’보 다 4일 빠른 극조생종이다. 벼키는 68 cm로 ‘오대’의 69 cm 와 비슷하며, 이삭길이와 주당 이삭수도 19 cm와 14개로 ‘오 대’와 비슷하나 이삭당 입수는 80개로 ‘오대’보다 많으며, 등 숙율은 78.5%로 ‘오대’보다 약간 낮고, 현미 천립중이 22.3 g으로 중립종이다. ‘청백찰’은 도열병저항성은 ‘오대’보다 강 하나, 흰잎마름병, 줄무늬잎마름병 및 벼멸구에 대한 저항성 이 없다. ‘청백찰’은 불시출수 현상은 ‘오대’와 비슷하였고 위 조현상은 없고, 내랭성검정 결과 내랭성이 ‘오대’와 비슷한 정도를 보였으며, 도복에 강한 편이다. ‘청백찰’의 제현율은 80.8%로 ‘오대’(82.5%) 보다 약간 낮고, 현미 장폭비가 1.86 으로 중단원립이다. 백미외관은 찹쌀이므로 뽀얗게 보이고, 알칼리 붕괴도는 ‘오대’의 6.7에 비해 5.5로 낮으며 단백질함 량은 7.1%로 ‘오대’의 6.7보다 약간 높다. 북부평야, 중산간 지 및 남부 고랭지 5개소, 동북부 해안 1개소, 중북부 고랭지 1개소에서 보통기 보비재배 평균 쌀수량은 5.35 MT/ha로 대 비품종 ‘오대’의 5.39 MT/ha과 비슷한 수량성을 보였다. ‘청 백찰’의 재배적지는 북부평야, 중산간지, 남부 및 중북부 고랭 지 및 동북부 해안지이다.

‘목양’은 국립식량과학원 벼 육종연구진이 총체 사료용 벼 품종을 육성할 목적으로 2001년 하계에 SR24592-HB2319 를 모본으로 하고 신초형 IR73165-B-6-1-1을 부본으로 교배 하여 계통육종법으로 육성한 품종으로 2010년 12월 농작물 직무육성신품종선정위원회에서 국가목록등재품종으로 선정 됨과 동시에 ‘목양’으로 명명하였다. ‘목양’의 출수기는 보통 기 재배에서 8월 23일로 ‘녹양’보다 8일 정도 늦은 만생종이 다. ‘목양’은 도열병, 줄무늬잎마름병, 오갈병에는 ‘녹양’보다 강하지만, 흰잎마름병, 벼멸구에는 약한 편이다. ‘목양’은 ‘녹 양’보다 탈립에 강하고, 후기녹체성이 우수하였다. ‘목양’은 가소화양분총량(TDN) 함량이 높고 중성세제불용섬유소(NDF) 와 산성세제불용섬유소(ADF)가 낮았다. ‘목양’의 총체수량은 지역적응시험에서 2008년부터 2010년까지 평균 17.7 MT/ha 로 ‘녹양’보다 25% 증수하는 경향을 보였다. ‘목양’은 가소화 양분총량(TDN)은 59.5%였으며 ADF와 NDF가 낮아 상대적 사료가치가 ‘녹양’에 비해 높은 품종이다. ‘목양’의 정조 수량은 보통기 재배에서 5.59 MT/ha로 ‘녹 양’보다 16% 증수되었다. 재배적지는 중부 및 남부평야지 1 모작 지대이다.