We examined effects of water temperature, salinity, irradiance, and different media on the growth of the toxic dinoflagellate Alexandrium tamarense (HYM9704), which was isolated from Jinhae Bay, Korea. The ranges of temperature and salinity in which the s

자연상태(自然狀態)에서 발현(發現)된 병반(病斑)을 이용(利用), 도열병균(稻熱病菌)의 포자형성량(胞子形成量)과 이탈량(離脫量)을 년(年)에 조사(調査)하였다. 절취(切取)한 병반(病斑)의 포자형성량(胞子形成量)과 자연상태하(自然狀態下)에서의 포자이탈량(胞子離脫量)은 병반발현후(病斑發現後) 일(日) 사이에 최고치(最高値)에 달(達)했으며 그 수(數)는 각각(各各) 16,200개(個)와 15,900개(個)였다. 자연상태하(自然狀態下)에서의 포자이탈(胞子離脫)은 30일간(日間) 지속(持續)되었다.

Two unrecorded alien plants, Melilotus officinalis (L.) Lam. and M. indicus (L.) All. (Leguminosae) were found in Korea. M. officinalis is native to Eurasia and widely distributed in agricultural regions throughout the world. M. indicus is native to Mediterranean and Southwestern Europe, and naturalized in temperate regions all over the world. These species are morphologically similar to M. suaveolens (Jeon-dong-ssa-ri). However, M. officinalis is distinguished from M. suaveolens by transverse nerved legumes, definite ovary stalks, and five to eight number of ovules in ovary. M. indicus is also distinguished from M. suaveolens by smaller size of flowers, broadly triangular calyx teeth, globose legumes, and minutely papillose seeds. The local name of M. officinalis and M. indicus were given as “Ju-reumjeon- dong-ssa-ri” and “Jom-jeon-dong-ssa-ri” based on transverse nerved legumes and overall smaller size than M. suaveolens, respectively. The descriptions on morphological characters and photographs at the habitat of M. officinalis and M. indicus are provided.

Radish, Raphanus sativus(2n = 18), belonging to the brassicaceae family, is herbaceous plant with 1-2 years life cycle. It is cultivated worldwide for producing leafy and root vegetables. Although an economically important crop, the genetics of yield and quality traits, disease resistance are not well-studies. The major purpose of this project is development of molecular breeding technology in radish. In this project, quantitative trait loci (QTL) for Fusarium wilt resistance of radish were analyzed. To identify QTL, genetic linkage map of radish was constructed using F2 mapping population derived from a cross between two inbred lines, “DB01” (resistant) and “DB05” (susceptible). A total 319 markers have been mapped into nine linkage groups, covering 639.3cM with an average distance of 2cM between loci. QTL mapping detected 2 loci conferring Fusarium wilt resistance. Two QTLs were located on LG3 and LG7, respectively. The QTL of LG3, flanked by EAGGMCT6 and WALK500 marker, exhibited a LOD value ranging from 2.3 to 8.7, and the R2 (Phenotypic variations) ranging from 28 to 48% in four tests. This QTL was named qYR1. The QTL of LG7, flanked by EACCMCAC-202 and DCJ14-390 marker, exhibited a LOD value ranging from 6.2 to 10.6, and the R2 ranging from 42 to 55% in four tests. This QTL was named qYR2. The results of the QTL analysis may be useful in marker-assisted selection (MAS) of Fusarium wilt resistant radish cultivars.

Anthocyanin has antioxidant and radical-scavenging effects which may protect cells from oxidative damage and reduce risk of cardiovascular diseases and cancer. A new peanut variety “Heuksaeng”(Arachis hypogaea ssp. hypogaea L.) with dark purple peanut skin was developed at the Department of Southern Area Crop Science, NICS, in Milyang in 2014. This variety was developed from the crossing line between cultivar “Iksan 31” with short stem and erect plant type and “Iksan35” with large grain and purple skin. “Heuksaeng” which is semi erect Virginia plant type has 32cm of main stem length and 25 branch number per plant. This also show more resistant to late leaf spot, web blotch and lodging, compared with check variety “Daekwang”. Each pod has two grains with ellipse shape of purple testa and its yield components is composed of 60 mature pods of per plant, 69g of 100-seed weight, 77% of pod shelling ratio in the regional yield trials(RYT). For 3 year regional yield trials the average kernel yield of “Heuksaeng” had 4.25 MT/ha similar to that of check variety. Its seed quality show 26.9% of crude protein and 46.0% of crude oil and 53.4% of oleate in fatty acid composition. Peanut skin of variety “Heuksang” consist of 2 kind of anthocyanin compounds such as 4.67mg/100g of delpinidine-3-glucoside (D3G) and 1.18mg/100g of cyanidine-3-glucoside(C3G). Peanut variety with high anthocyanin conent in skin will be useful to the recent preference of colorful food with healthful functional compounds.