A winter wheat (Triticum aestivum L.) cultivar, ‘Taejoong’, was developed by the National Institute of Crop Science, Rural Development Administration in 2016. It was derived from a cross between ‘Xian83(104).11’ and ‘Keumkang’ in 2005. It was generated through the bulk and pedigree methods for six years, and then designated as ‘Iksan370’ after a two-year advanced yield trial test. This variety was designated the name ‘Taejoong’ after a regional yield trial test in eight locations throughout Korea for three years from 2014 to 2016. Its heading date was April 27 in upland and paddy filed conditions, and its maturity date was June 7 in uplands and June 4 in paddy fields, which were late compared to that of ‘Keumkang’. ‘Taejoong’ had 417 spikes per m², which was 300 less than that of ‘Keumkang’. However, the spike length was 13.4 cm and the number of kernel per one spike was 48, which was 5.8 cm longer and 19 higher than those of ‘Keumkang’, respectively. ‘Taejoong’ showed strong resistance to lodging and moderate resistance to Fusarium head blight, but was susceptible to powdery mildew. ‘Taejoong’ flour yield (71.8%) and flour lightness (91.90) were similar to those of ‘Keumkang’, but its protein content (11.1%), gluten content (8.8%), and sodium dodecyl sulfate-sedimentation volume (34.2 ml) were lower. These result showed that the flour dough strength of ‘Taejoong’ was weaker than that of ‘Keumkang’. The high-molecular-weight gluten subunit compositions of ‘Taejoong’ were Glu-A1 (N), Glu-B1 (7+9), and Glu-D1 (2+12). The granule-bound starch synthase compositions were Wx-A1, Wx-B1, and Wx-D1. The puroindoline compositions were Pina-D1 (a type) and Pinb-D1 (b type). The average grain yield of ‘Taejoong’ in a regional yield trial was 5.3 ton/ha in uplands and 4.6 ton/ha in paddy fields, which were 21% and 13% higher than that of the reference cultivar, ‘Keumkang’, respectively. (Registration No. 7378).

The ω5-gliadins are the major allergens in wheat-dependent excise-induced anaphylaxis (WDEIA). In this study, SDS-PAGE analysis was used to assign the ω5-gliadins (Gli-B1) alleles in thirty two Korean wheat cultivars, compared with eleven standard wheat cultivars for Gli-B1a~m alleles. These results were reconfirmed with their complementary Glu-B3 low-molecular-weight glutenin subunits alleles tightly linked with Gli-B1 locus revealed with 2-DGE in our previous study. As a result, one Gli-B1b, four Gli-B1d, two Gli-B1f, six Gli-B1m and nineteen Gli-B1h varieties were identified. This is the first report on revealing the Gli-B1 alleles in Korean wheat cultivars and represents valuable basic data on wheat allergy, relationship between gliadin and wheat quality, and development of hypo-allergenic wheat.

“Cheongwoo”, a white winter wheat (Triticum aestivum L.) cultivar was developed by the National Institute of Crop Science, RDA. It was derived from the cross “Kanto75/8/Tapdong/4/Bb#1/Jangkwang// STRAMCHO/3/Suwon220/5/Suwon185/ CI12703//Kanto75///Suwon219/7/F1277” and “Keumkang” in 1998 at RDA. “Keumkang” is a semi-hard white winter wheat with high yield. And mother plant is a winter wheat with long culm length, high yield. “Cheongwoo” was evaluated as “Iksan326” in Advanced Yield Trial Test in 2007. It was tested in the regional yield trial test between 2008 and 2009. “Cheongwoo” is first whole crop wheat with long culm length, high-yield. The Heading date of “Cheongwoo” was similar to “Keumkang”. The average forage yield of “Cheongwoo” was about 14.8 ton ha^-1 in dry matter in paddy field. This dry matter was higher than dry matter of “Keumkang” (13.2 ton ha^-1). The cultivar had 97 cm of culm length, 1,070 spikes per m² and it showed better rate of culm. Culm length of “Cheongwoo” were longer than “Keumkang”. This cultivar would be suitable for the area above the daily minimum temperature of -10°C in January in Korean peninsula. Our research will improve good-quality of silage by using winter cereal crops.

‘Goso’, a winter wheat (Triticum aestivum L.) cultivar was developed by the National Institute of Crop Science, RDA for end-use diversity. It was derived from the cross ‘Gobun/Ol” during 1998. ‘Goso’ was released from the line named as ‘Iksan325’ in 2010 after yield trials test in conducted for three years from 2008. ‘Goso’ is an awned, semi-dwarf, red grain and soft winter wheat. The heading and maturity date of ‘Goso’ were similar to ‘Keumkang’. ‘Goso’ had similar test weight (799 g/L) and lower 1,000-grain weight (42.5 g) than ‘Keumkang’ (804 g/L and 46.7 g, respectively). ‘Goso’ showed resistance to winter hardiness and pre-harvest sprouting, which withering rate on the low ridge (4.4%) and lower rate of pre-harvest sprouting (4.0%) than ‘Keumkang’ (1.6% and 29.8%, respectively). ‘Goso’ showed lower flour yield (63.7%), protein content (9.8%), SDS-sedimentation volume (30.0 ml) and gluten content (7.2%) than ‘Keumkang’ (73.6%, 12.6%, 50.0 ㎖ and 10.8%, respectively). It showed larger diameter (88 mm) and top-grade (5) of cookie than ‘Keumkang’ (79 mm and 2, respectively). HMW-GS compositions of ‘Goso’ were 2* in Glu-A1, 7+8 in Glu-B1 and 2.2+12 in Glu-D1, respectively. GBSS composition of ‘Goso’ was same with ‘Keumkang’ and expressed wild type. Pinb-D1 was wild type that was different in ‘Keumkang’. Average yield of ‘Goso’ in the regional adaptation yield trial test was 657 kg/10a in upland and 561 kg/10a in paddy field, which was 21% and 7% higher than those of ‘Keumkang’ (545 kg/10a and 524 kg/10a, respectively).

‘Joongmo2004’, a winter wheat (Triticum aestivum L.) cultivar was developed by the National Institute of Crop Science, RDA. It was derived from the cross ‘Bacanora88/Keumkang//Keumkang’ during 1996. ‘Joongmo2004’ was evaluated as ‘Iksan320’ in advance yield trial test in 2006. It was tested in the regional yield trial test between 2007 and 2009. Its heading date was April 26 in upland and April 23 in paddy filed conditions, and Maturity date was June 5 in upland and June 4 in paddy field, which were similar to Keumkang, respectively. It showed 830 in number of spikes per m², 35 of grain number per spike, 44.9g of 1,000 grain weight, and 806g of test weight. ‘Joongmo2004’ showed moderate to fusarium graminearum (Scab) in test of specific character although ‘Keumkang’ is susceptible to scab. ‘Joongmo2004’ had higher flour yield (75.5%) than ‘Keumkang’(72.5%). ‘Joongmo2004’ showed similar ash (0.42%), lower protein content (12.3%), SDS-sedimentation volume (43.0 ml) and gluten content (10.3%) than ‘Keumkang’ (0.42%, 13.1%, 57.8ml and 10.8%, respectively). It showed higher lightness (89.97), redness (-1.38) and yellowness (10.76) in flour color than ‘Keumkang’ (89.61, -1.15 and 9.46, respectively). ‘Joongmo2004’ exhibited lower hardness (3.50N), similar springiness and higher cohesiveness of cooked noodles (0.92 and 0.65) compared to ‘Keumkang’ (4.54N, 0.93, and 0.63, respectively). The average grain yield in the regional yield trial was 517 kg/10a in upland and 534 kg/10a in paddy field, which were 11% lower and 3% higher than that of the check cultivar, ‘Keumkang’, respectively.

‘Joongmo2003’, a winter wheat (Triticum aestivum L.) cultivar was developed by the National Institute of Crop Science, RDA. It was derived from the cross ‘SW86054/Keumkang’ during 1997. ‘Joongmo2003’ was evaluated as ‘Iksan318’ in advance yield trial test in 2006. It was tested in the regional yield trial test between 2007 and 2009. Its heading date was April 24 in upland and April 21 in paddy filed conditions, which was two days earlier than those of the check cultivar ‘Keumkang’, respectively, and maturity date was June 4 in upland and June 2 in paddy field, one or two days earlier than those of ‘Keumkang’, respectively. ‘Joongmo2003’ showed resistance to winter hardiness and pre-harvest sprouting, which lower withering rate on the low ridge (0.3%) and rate of pre-harvest sprouting (18.5%) than ‘Keumkang’ (9.2 and 25.8%, respectively). ‘Joongmo2003’ showed similar protein content (13.2%), lower SDS-sedimentation volume (54.0 ml) and higher gluten content (11.7%) than ‘Keumkang’ (13.1%, 57.8ml and 10.8%, respectively). It showed higher lightness (89.85) of flour and noodle dough sheet than ‘Keumkang’ (89.81 and 80.28, respectively). ‘Joongmo2003’ exhibited similar hardiness (3.84N), springiness and cohesiveness of cooked noodles (0.92 and 0.63) compared to ‘Keumkang’ (4.54N, 0.93, and 0.63, respectively). The average grain yield in the regional yield trial was 555 kg/10a in upland and 485 kg/10a in paddy field, which were 4% and 7% lower than those of the check cultivar, ‘Keumkang’, respectively.