Two cherry tomato plant cultivars (Lycopersicon esculentum Miller, cultivars ‘Koko’ and ‘Pepe’) were supplied with high (395 ppm), medium (266 ppm) and low (199 ppm) concentrations of nitrogen to determine the influence of nitrogen fertilization on development, cultivar preference and honeydew production by greenhouse whiteflies, Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae). The nitrogen, protein, andchlorophyll content of tomato leaves were higher in the high nitrogen supplied plants than in the medium or low nitrogen supplied plants, but the sugar content showed an inverse relationship. The developmental times of eggsand nymphs decreased as the nitrogen concentrations increased in both cultivars. The preference of T. vaporariorum was compared by counting the number of eggs deposited on leaves in choice and non-choice tests. In the non-choice test, no significant nitrogen treatment effects were observedbut the upper plant stratum was preferred for egg laying. In the choice test, there were significant main effects of cultivar and nitrogen concentration. T. vaporariorum laid eggs more on leaves of plants with higher nitrogen at the upper stratum. In both experiments, T, vaporariorum preferred the ‘Koko’ cultivar to the ‘Pepe’ cultivar. The honeydew production of T. vaporariorum nymphs increased with decreasing nitrogen treatment concentrations. The largest honeydew production was detected in the ‘Pepe’ cultivar grown at low nitrogen concentration. It is concluded that cultivar ‘Pepe’ had an advantage over ‘Koko’ in term of T. vaporariorum management program in tomato greenhouses.

Radish (Raphanus sativus L.) is a widely-consumed root vegetable that is grown worldwide. To utilize the radish genetic resources for breeding research, we collected radish germplasms and evaluated their morphological and genetical characteristics. Here, phylogenetic relationship of 288 accessions were analyzed using 16 SSR markers and classified cytoplasm male sterility (CMS) types using cpDNA-based molecular markers. To create a collection of 288 accessions, 188 and 73 accessions were selected from RDA-Genebank (Korea) and NIAS-Genebank (Japan), respectively, after generation advancement for the accessions with low uniformity. In addition, 27 elite lines currently used for commercial radish breeding programs were included. In the result of phylogenetic analysis, 288 accessions were clustered into 5 major groups corresponding to the morphological traits and origins at the similarity coefficient value of 0.51. Analysis of CMS types revealed that majority of accessions were determined as DBRMF1 and DBRMF2 mitotypes, 15 accessions to Ogura and 4 accessions to DCGMS mitotypes. Further genetic analysis for radish germplasm will be valuable in assisting radish f1 hybrid breeding.

본 연구는 무용 연습 시에 지각된 동기 분위기가 무용과 대학생의 목표성향에 미치는 상대적 영향력을 검증하는 데에 목적을 두었다. 무용과 대학생 424명(남학생 37명, 여학생 387명)이 연구에 참여하여 지각된 동기 분위기와 목표성향 질문지에 응답하였다. 자료는 탐색적 요인분석과 내적일관성 분석, 확인적 요인분석, 상관분석, 이원 다변량분석을 통해 분석되었다. 연구 결과 학년에 따라 지각된 동기분위기와 목표성향 수준에 차이가 있으며, 지각된 동기 분위기와 목표성향 하위요인 간에 정적 상관을 보였다. 또한 무용 연습 시에 지각된 동기 분위기는 과제성향과 자기성향목표에 영향을 주지만, 지각된 수행 분위기는 3학년의 과제성향과 자기성향목표에 더 기여하였다. 그러나 4학년의 경우에 지각된 숙련 분위기와 수행 분위기는 각각 과제성향과 자기성향목표에 크게 기여하였다. 결론적으로 무용 연습 시에 지각된 동기 분위기는 무용과 대학생들의 목표성향을 예측하는 주요 변인이라 할 수 있다.