An allo-octoploid strawberry (Fragaria × ananassa Duch.) is one of the most important vegetable crops in Korea. However, there were few genomic researches of strawberry due to polyploidy and complexity of its genome. In this study, we aimed to construct a genetic linkage map of strawberry using single nucleotide polymorphism (SNP) markers that were developed through a next-generation sequencing (NGS) analysis. Two strawberry varieties, ‘Sulhyang’ and ‘Senga-sengana’, were used as a maternal and a paternal parent, respectively, and their F1 generation consisting of 94 individuals was used for construction of a genetic linkage map. A total of 19.0 Gbp (‘Sulhyang’) and 21.8 Gbp (‘Senga-sengana’) of genomic sequences were obtained through NGS analysis. Subsequently, approximately 87,000 SNPs were identified and 1,154 primer sets for high-resolution melting (HRM) analysis were designed through bioinformatic analysis. In result, a total of 224 polymorphic HRM markers were developed and 205 markers were mapped on the genetic linkage map of strawberry, which total length was 800.8 cM and the number of linkage groups were 30. This SNP-based genetic linkage map and the 224 SNP markers will be very helpful for the genomic and genetic researches of allo-octoploid strawberry.

매운맛은 고추품질에 영향을 주는 주요형질 가운데 하나이 다. 매운맛 분석은 번거롭고 시간이 많이 소요되는 작업이다. 매운맛 분석 효율을 개선하기 위해 본 연구에서는 0.1 N NaOH 와 0.2% 2,6-dichloroquinone chlorimide 용액을 이용한 간 이분석법을 개발하였다. 이 방법을 분무법으로 명명하였는데, 위 분무액을 과피를 제거한 고추 과실에 직접 분무하거나 고 추 절단면이 찍힌 종이 위에 분무함으로써 캡사이시노이드를 5분 이내에 분석할 수 있었다. 분무법의 캡사이시노이드 검출 감도는 40 ppm이었고, 분무법으로 캡사이시노이드 유무, 대 략적인 양, 과에서의 분포를 육안으로 판독할 수 있었다. 분무 법은 고신미 고추 품종을 육성하는 고추 육성 현장에 매우 유 용할 것으로 판단된다. 사

Phytophthora capsici Leonian causes root rot and stem blight in pepper (Capsicum spp.) and is a serious threat to pepper production because of its ability to infect every root, stem, and leaf at any developmental stage. Recently, pepper F1 cultivars resistant to Phytophthora root rot have been commercially released in Korea. However, despite many studies, the inheritance of resistance remains controversial due to differences in experimental methods, including pepper materials, pathogen isolates, inoculation conditions, and evaluation methods. Our aim was to determine the inheritance of Phytophthora root rot resistance by using three different F2 populations derived from crosses between ‘CM334’ (a resistant male parent) and three Korean landraces, ‘Subicho’ ‘Daehwacho’ and ‘Chilsungcho’ (susceptible female parents), and inoculating them with three different pathogen densities (1 ¯ 10 4 , 1 ¯ 105 , and 1 ¯ 106 zoospores/ml). The distribution patterns were varied, depending upon female parental susceptibility as well as inoculum densities. For example, as the inoculum density increased, pepper survival rates decreased. In all of the inheritance analyses, one common dominant resistant gene was participated in resistance to Phytophthora root rot. In addition, we found that a complementary gene, together with the major dominant gene, was necessary for resistance at a high (10 6 ) inoculum density, based on a 9:7 (R:S) segregation ratio. This study will be helpful in developing molecular markers linked to genes that are resistant to Phytophthora root rot.