The objective of this study was to evaluate the sperm liquid storage diluted with Brine Mineral Water (BMW) in miniature pig. Therefore we performed to find optimal concentration of BMW. The ejaculated semen from miniature pig was collected by gloved-hand method. The collected semen was diluted with dilution solution (Mulberry Ⅲ; modified-Modena B) which BMW was added. Concentration of BMW was 0, 2.5, 5, 7.5, 10 and 12.5% in dilution solution. The diluted semen was preserved at 17℃. Sperm ability was estimated by viability, capacitation acrosome reaction using chlortetracycline (CTC), hypoosmotic swelling test (HOST), morphologic abnormality. The diluted semen was observed for 7 days. The viability was significantly measured higher at 2.5% concentration of BMW than other groups (p<0.05). The AR-pattern of CTC analysis was significantly measured lower at 12.5% concentration of BMW than other groups (p<0.05). However, abnormality was not significantly different among all the groups (p<0.05). In conclusion, viability of sperm was the highest at 2.5% concentration of BMW but BMW had a negative effect on HOST, capacitation and acrosome reaction in sperm of miniature pig.

Bakanae disease of rice, caused by Fusarium moniliforme Sheldon, the imperfect stage of Gibberella fujikuroi, is one of the most important rice diseases worldwide, but no rice variety has been found to be completely resistant to this fungus. Cultivation of resistant cultivars is the most beneficial way of reducing quantitative or qualitative losses to for bakanae disease in rice. To facilitate the study of this disease, accurate and large scale screening methods were developed for the inoculation and evaluation of Bakanae disease. Even and large scale infection was achieved by using F. moniliforme spore in tissue embedding cassette and seedling tray. The efficiency of F. moniliforme infection with the concentration of 1×106 spore/ml caused better distribution (F-value=33.96) than 1×102 (F-value=10.69), and 1×104 spore/ml (F-value=2.63). We established new criteria of healthy and non-healthy plant, and introduced calculation of proportion of healthy plants to meet fast evaluation of resistance level of each variety. The effect of F. moniliforme strains containing different genetic background was also evaluated with rice varieties to figure out the stability of resistance level. GA3 response of rice variety was significantly correlated with bakanae disease, but it did not adequate for direct indicator of bakanae disease resistance. These results indicated that a large scale infection method developed in this study is fast and reproducible, as well as a disease evaluation system provides an accurate measurement of bakanae disease resistance of rice.