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Young Hyun Om(嚴榮鉉),Dae Geun Oh(吳大根),Kue Hyon Hong(洪珪鉉) 한국육종학회 1987 한국육종학회지 Vol.19 No.4
Bush and non-branching characters of squash are very important for the plastic-house cultivation. In Cucurbita pepo L., the bush and non-lateral branching variety ‘Zucchini’ was crossed with the viny and multiple branching variety ‘PI 285611’. The inheritance of bush and branching habits was investigated in F₂ and BC₁F₁ populations. The segregation ratios indicated that the bush character be governed by a single dominant gene pair in the fashion of partial dominance. The degree of dominance lessened as the growth proceeded. Non-lateral branching character seemed to be controlled by a few major dominant genes.
Young Hyun Om(嚴榮鉉),Kwan Soon Choi(崔寬淳),Chang Hwan Lee(李昌煥) 한국육종학회 1986 한국육종학회지 Vol.18 No.2
Principal component analysis and cluster analysis were adopted for classifying 59 varieties collected for improvement of red pepper. The first five components accounted for about 80 percent of the total variation of 11 characters. Most of these characters made approximately 70 percent contribution to the components with high proportion at the upper principal components and low proportion at the lower ones. Days to first flowering and the characters related to plant size were positively correlated with the first and second principal components’ score of varieties, but weight per fruit was negatively correlated with them. There was anomalous correlation between the others and the components’ score. The 59 red pepper varieties were classified into 7 varietal groups. Most of the varieties belonged to group Ⅰ to group Ⅲ, and the others did to group Ⅳ to group Ⅶ with each composition ranging from two to three varieties.
裁培種 감자 半數體와 近緣野生種間 交雜에서 endosperm balance number(EBN)의 영향
조현묵(Hyun Mook Cho),김혜영(Hei Young Kim-Lee),엄영현(Young Hyun Om),김정간(Jung Kan Kim) 한국육종학회 1997 한국육종학회지 Vol.29 No.2
The effect of Endosperm Balance Number (EBN) in interploidal and interspecific crosses between S. tuberosum dihaploids and tuber-bearing wild species was investigated. The crossability was evaluated by the percentage of berry set and the average number of seeds per berry. The percentages of berry set were 11.5%, 11.4%, 7.4% and 2.2% in 4x×4x, 4x×2x, 2x×2x and 2x×4x crosses, respectively. The number of seeds per berry was in the same order as the percentages of berry set. The crossability was greatly affected by the ratio of the maternal and parternal EBN in the endosperm. The crosses with the maternal and parternal EBN ratio of 1 : 1, 1 : 1/2 and 4 : 1 in the developing endosperm did not produce hybrid seeds. However, a lot of plump hybrid seeds were produced only in 2 : 1 of EBN ratio irrespective of differences of the species used or ploidy levels of the parents.