Lately, the autumn cropping areas of potato have been steadily increased to supply fresh potatoes all year round in Korea. Although "Dejima" is a main cultivar for autumn cropping, it is very susceptible to common scab (Streptomyces scabies) and show high frequency of physiological disorders such as knobs and cracking on tubers. "Chudong" was bred in 2002 for fresh table use from a cross between H83520-3 with short tuber dormancy and "Superior" with common scab resistance. It has attractive, round tuber shape with white skin and flesh colors. Its tuber dormant periods is 5 days longer than 65 days of "Dejima". Its average yields were 32.4 and 21.8 ton/ha at 90 days after planting in spring and autumn cropping of regional yield trials, respectively. It is more resistant to common scab and potato leaf roll virus and less susceptible to late blight (Phythophthora infestans) compared to "Dejima". However, it is susceptible to potato virus Y.

‘Seohong’ was bred within the potato breeding program of National Institute of Highland Agriculture (NIHA). It was originated from a cross made in 1997 between ‘Jashim’ as a female and 93K65-1 as a male parent. Seohong was evaluated as a seedling number 97S05-1 for tuber characteristics, growth and yielding ability from 2001 to 2002, and than this clone was renamed as Daegwan 1-82. This clone was evaluated in the regional yield trial and the disease resistance in the five locations for three years. Finally, this clone was named as ‘Seohong’ and registered a new recommended potato cultivar in 2006. This cultivar has a round, shallow eye depth, light red-skinned tuber characteristics and low to medium dry matter content. It showed high resistance to common scab (Streptomyces scabies) and potato leaf roll virus (PLRV), however it was susceptible to potato virus Y (PVY) and late blight (Phytophthora infestans). Its mean tuber yields from the regional yield trial and winter cropping trial were 12 and 49 percent higher than that of ‘Superior’, respectively.

We performed field trials to assess levels of changes in intrinsic properties and resistance against soft rot of the potato cultivar ‘Irish Cobbler’ upon the introduction of the Shiva-1 gene. Each five lines, transformed with Shiva-1 gene controlled by the PAL5 promoter (P) and by the CaMV 35S promoter (E) were evaluated in the field. In based on evaluation of 10 defined morphological characteristics, all the transgenic clones of both lines proved to be true to type. When five agronomic characteristics were taken into account as well, all the transgenic lines except E8 were considered to be true to type. According to the result of northern blot analysis, seven (P1, P3, P4, P6, E10, E12, and E16) transgenic clones could be distinguished clearly from corresponding untransformed clones. But in three lines (P8, E5, and E8), no hybridization signal was detected. There seems to be positive correlation between the levels of resistance to soft rot and the transgenic expression at mRNA levels in P lines. But in the case of E lines, however, there doesn’t seem to be any correlation between the levels of disease resistance and mRNA expression

We study on the dynamic interaction with a simulated physical-biological coupled model response to nutrient reduction scenario in Jinhae Bay. According to the low relative errors, high regression coefficients of COD and DIN, and realistic distribution in comparison to the observation, our coupled model could be applicable for assessing the marine ecosystem response to nutrient input reduction in Jinhae Bay. Due to the new construction and expansion of sewage treatment plant from our government, we reduce 50% nutrient inputs near Masan Bay and sewage treatment plant. COD achieves Level Ⅱ in Korea standard of the water quality from the middle of the Masan Bay to all around Jinhae Bay except the inner Masan Bay remaining at Level Ⅲ. When our experiment reduces 50% nutrient inputs near Masan Bay and Dukdong sewage treatment plant simultaneously, COD decreases to about 0.1-1.2 mg/L (128°30’~128°40’ E , 35°05’~35°11’ N). The COD from the middle of the Masan Bay to Jinhae Bay achieves Level Ⅱ.

“Haryeong” was bred through the potato breeding program at the National Institute of Highland Agriculture (NIHA). Itin1996. It has a round, smooth, light yelow-skined tuber characteristics and high dry mater content. It showed high resistance tolate bligh

Gahwang is an excellent chipping cultivar with yellow flesh, short oval tuber shape and mid-early maturity. Its yields were a little higher than Atlantic through the regional trials with five locations. It has a lower incidence of internal brown spot comp

Shinnamjag is a round, smooth, white-skinned, and fleshed potato cultivar with erect plant shape and early maturity. It has excellent table quality. Its yields are high, especially with prominent marketable yield compared to Superior, a leading potato cul

Most of recommended potato varieties in Korea are white skin colored. Purple skinned potatoes have been recognized as being effective in the prevention of gastric disease. A new variety “Jaseo” has dark purple skin and white flesh colors, and attractive r

‘Jowon’ is a new early-maturing potato variety for table use. It has spreading growth habit with narrow oval leaves. Its tubers are attractively round with white skin and light yellow flesh color. The yielding ability of Jowon is similar to Superior. Jowo