This study was carried out to investigate varietal variation of dry matter production, and to classify varieties on the basis of dry matter production, and to analyze relationships between seed yield and dry matter production in 28 germplasm. Descending o
This study was carried out to investigate the relationship between resistance to brown planthopper (Bph) and some agronomic characters of rice using two japonica RILs (F4) of Milyang 95/Milyang 64 and Milyang 165/Milyang 64. Culm len
To screen the breeding materials suitable for potato chips, the selected 67 lines from 15 relative-wild species of potatoes, which well produce their tubers under the long day conditions of Korea, were evaluated for the specific gravity and glucose conten
The aim of this project was to produce pure seed which F1 hybrids were very excellent in yield components with hybrid vigour. The work was carried out to produce the seeds with maintenance of purity in an isolated P.E. film house, to investigat
Rapeseed as a partial allogamous crop(allogamy rate : 25~75%) displays depression by continuous selfing. Therefore, it is essential to produce F1 hybrids with high yield using cytoplasmic genetic male sterility(CGMS). This breeding system needs to develop
This study was carried out to obtain basic information of Plasmodiophora brassicae in highland and selection of Chinese cabbage cultivars resistant to clubroot disease. According to the disease index(10% cut-off), physiological definitions of Plasmodiopho
In order to know the phylogenetic relationships between wild, weedy and cultivated rice, half diallel crosses among nine accessions including a wild rice Oryza rufipogon W130, three long grain weedy rices Cheongdoaengmi 1 from Korea, C9575 from Japan, BT5
The effect of MS medium supplement and coumarin on in vitro microtuber formation of potato was investigated. In vitro tuberization of potato by MS medium supplement differed from cultivars used and a potato cultivar, ‘Superior’, showed significantly highe
Eleven near-isogenic lines(NILs) of rice having different resistance gene to BB in IR24 genetic background were evaluated for resistance to BB under the different nitrogen fertilizer levels. Lesion length of compatible NILs to races K1, K2 and K3 of BB un
The somatic hybrids between Solanum brevidens and S. tuberosum (cv. ‘Superior’ and ‘Dejima’) can be selected through the number of chloroplasts in the guard cells, SSR (simple sequence repeats) and AFLP. In order to facilitate the identification of hybrid
This study was conducted to explore and collect the wild adzuki bean (Vigna angularis var. nipponensis) and its relative (V. nakashimae) from the basins of Namhan and Bukhan rivers in Korea. Their DNA polymorphism and genetic relationships were measured.
To improve the transformation efficiency by Agrobacterium tumefaciens mediation in indica rice, we used calli derived from immature and mature embryo. Calli formed from immature embryos produced more transgenic plants than those from mature embryos. The m
This study was carried out to evaluate the component and content of anthocyanin pigments, free sugars, and organic acids in mulberry fruit. Fructose and glucose were identified as the major free sugars, and oxalic, malonic, succinic, malic, and citric aci
This study was carried out to analyze the three embryo size mutants types (giant embryo; ge, reduced embryo; re, embryoless; eml) and to identify relationship among the genes controlling ge, re and eml genotypes. Difference of grain type and grain size in
Epicotyl grafting in one of the most efficient propagation methods for walnut trees. We have analyzed the scion factors that may influence the survival rate of the grafts. The optimum time for the collection of scions was turned out to be between January
For the economical mass production of the interspecific hybridization, we developed the modified system of mass pollination where controlled pollination was done with pollen mix from good father trees and without pollination bags in a closed greenhouse. U
Korean sweetpotato, Ipomoea batatas, varieties were examined for the cross-compatibility and -incompatibility through inter-crosses among them to obtain the fundamental genetic informations for enhancing the heterosis breeding efficiency. The pollen germi
This study was carried out to establish the analysis condition for oligosaccharides of soybeans (Glycine max L.) and to assay quantitative evaluation of oligosaccharide contents in soybean varieties and soybean sprouts. 55% acetonitrile solution used as a
The content of sucrose is one of the most important characters in the value of quality of melon fruit. For genetic studies of sucrose content, a wild melon GM42, as a very low sucrose parent (mean, 9.82 mg · g-1 fresh wt) was crossed with a hig
In order to obtain the genetic information on rachis traits of rice panicle, half diallel analysis for primary and secondary rachis branches was conducted using six crosses of F1s from four parents. Both additive and dominant gene effects were