태백산 분지에 분포하는 탄산염 및 규질쇄설성 혼합 퇴적물로 구성된 세송층(late Middle Cambrian to Furongian)은 δ 13 C값이 1.14에서 2.81‰을 갖는 SPICE (Steptoean positive carbon excursion)를 15 m 두께의 층서구간 에서 보여준다. SPICE는 Fenghuangella laevis대, Prochuangia mansuyi대 그리고 Chuangia대로 구성된 삼엽충 생물대 에서 산출되며 이는 Paibian Stage의 하부에 해당된다. 세송층은 엽층리 이암, 단괴상 셰일, 엽층리 사암, 균질사암, 석 회역암, 석회암-셰일 쌍을 포함한 6개의 암상으로 구성된다. 세송층은 폭풍파도기저면 아래의 외대륙붕에서 퇴적된 것 으로 알려져 있다. 시기적으로 Paibian Stage에 속하는 SPICE는 세송층에서 고수위 퇴적계 다발, 대비 정합면과 해침 퇴적계 다발에서 발견된다. SPICE의 최대 안정 탄소 동위원소 값은 상대적인 해수면 하강에 의해 형성된 대비 정합면 과 일치한다. 세송층에서 SPICE의 산출은 SPICE가 화석의 산출이 결여된 지층의 전세계적 대비를 위해 사용될 수 있 는 도구임을 암시한다.

A new Gomchwi cultivar ‘Sammany’ was developed by a cross between Gomchwi (Ligularia fischeri (Ledeb.) Turcz.) and Handaeri-gomchwi (Ligularia fischeri var. spiciformis Nakai). Gomchwi is a common Korean name referring wild edible plant species within Ligularia genus. ‘Sammany’ has purple colored petiole ears and petiole trichome is absent. It has 2nd degree leaf vein density. Plant height, leaf length, leaf width and petiole length were 46.2, 19.1, 19.5 and 32.1 ㎝, respectively. Plant height was higher than ‘Gondalbi’. Bolting occurred in mid. July and it flowered from late August to early September. ‘Gondalbi’ bolted and flowered 26 days earlier than ‘Sammany’, and consequently has earlier flowering time more than 26 day. Leaf number of ‘Sammany’ was 156 per plant but ‘Gondalbi’ had 130. ‘Sammany’ had thicker leaves (0.61 ㎜) compared to ‘Gondalbi’ (0.46 ㎜). As a result, yield was higher in ‘Sammany (1,077 g/plant)’ than ‘Gondalbi (798 g/plant)’ and leaf hardness was lower in ‘Sammany (20.8 ㎏/㎠)’ compared to ‘Gondalbi (23.0 ㎏/㎠)’. In addition, ‘Sammany’ was found to be moderately resistant to powdery mildew. With enhanced agronomic and pathology traits, ‘Sammany’ was newly registered as a new Gomchwi cultivar (variety protection no. 131 on May 2017).

“Greenstar”, a new Saxifraga cultivar was bred by crossing between “Geumgongjak” with green (YG145C) petals and “Rokseon” with red purple (RP62A) petals in 2003. The selection and flower characterization were conducted from 2003 to 2006 in greenhouses of the National Institute of Highland Agriculture. The flowering of “Greenstar” starts on September 17 for 36 days and the number of flowers per plant was about 290. The flower color is a green (G142C) and the number of petals was 5. Flower width is 2.1 cm and flower length is 1.9 cm. “Greenstar” can be used for pot flower. Fifty percent shading is a good cultural practice against direct sunlight and soft rot disease would occur usually by over-irrigation.

A new Saxifraga cultivar “Snowmaple” was bred by crossing between “Jeokhoamugab” with red purple (RP68B) petals and “Hongsaja” with red purple (RPN66A) petals. The selection and flower characterization were conducted from 2004 to 2006 in greenhouse of the National Institute of Highland Agriculture. The flowering of “Snowmaple” starts on October 9 for 16 days, The number of flowers per plant was 315 with strong concurrent flowering habit. The flower shows red purple (RP62C) at opening, but It turns gradually changable from red purple to white. The flower has 5 petals, and the size is 2.0 cm in width and 2.3 cm in length. “Snowmaple” can be used for pot flower. Fifty percent shading is a good cultural practice against direct sunlight and soft rot disease would occurs usually by over-irrigation.

“Harmony”, a new Saxifraga cultivar was released by the National Institute of Highland Agriculture (NIHA), in 2006. A crossing was made between “Hongsaja” with red purple (RPN66A) petals and “Yangwoo” with red-purple (RP61C) petals in 2004. The selection and flower characteristics were investigated from 2004 to 2006 in greenhouse. The first flowering time of “Harmony” is 28th of September, period of flowering is 29 days and number of flowers per plant was 224.1. The flower color shows a red purple (RPN66A) and number of petals was 11.0. Flower width is 1.8 cm and flower length is 1.4 cm. It can be used for pot flower. 50% shading treatment is a good cultural practice against direct sunlight and soft rot disease occurs usually by over-irrigation.

“Piangse”, a new Saxifraga cultivar was released by the National Institute of Highland Agriculture (NIHA), in 2006. A crossing was made between “Jeokhoamugab” with red purple (RP68B) petals and “Okchung” with red-purple (RP62A) petals in 2004. The selection and flower characteristics were investigated from 2004 to 2006 in greenhouse. The first flowering time of “Piangse” is 25th of September, period of flowering is 25 days and number of flowers per plant was 98.1. The flower color shows a white (W155C) and number of petals was 7.0. Flower width is 3.6 cm and flower length is 2.9 cm. It can be used for pot flower. 50% shading treatment is a good cultural practice against direct sunlight and soft rot disease occurs usually by over-irrigation.

“Festival”, a new Saxifraga cultivar was released by the National Institute of Highland Agriculture (NIHA), in 2006. A crossing was made between “Bulzihoa” with red purple (RPN57C) petals and “Hongkyo” with red purple (RPN57C) petals in 2002. The selection and flower characteristics of “Festival” were investigated from 2003 to 2006 in greenhouse. The first flowering time of “Festival” is 19th of September, period of flowering is 36 days and number of flowers per plant was 119.9. The flower color shows a red purple group (RP63C) and number of petals was 7.1. Flower width is 3.5 cm and flower length is 3.6 cm. It can be used for pot flower. 50% shading treatment is a good cultural practice against direct sunlight and soft rot disease occurs usually by over-irrigation.

“Passion”, a new Saxifraga cultivar was released by the National Institute of Highland Agriculture (NIHA), in 2006. A crossing was made between “Hongsaja” with red purple (RPN66A) petals and “Vibo” with red-purple (RPN66B) petals in 2004. The selection and flower characteristics were investigated from 2004 to 2006 in greenhouse. The first flowering time of “Passion” is 1st of October, period of flowering is 26 days and number of flowers per plant was 211.2. The flower color shows a red purple (RPN66A) and number of petals was 6.0. Flower width is 3.0 cm and flower length is 2.0 cm. It can be used for pot flower. 50% shading treatment is a good cultural practice against direct sunlight and soft rot disease occurs usually by over-irrigation.