DROUGHT TOLERANCE INDEX DERIVED FROM CHLOROPHYLL FLUORESCENCE PARAMETERS IN MAIZE(ZEA MAYS L.)

摘要

The purpose of the present invention is to provide fluorescence parameters obtained through chlorophyll fluorescence analysis as an index which is associated with drought resistance. The present invention comprises a numerical formula obtaining a drought stress factor index exhibiting a drought degree composed of photochemical reaction parameters for selecting breeding using a chlorophyll fluorescence phenomenon that is a photochemical physiological reaction. Drought Stress Factor Index (DSFI) is equal to log [PI_TOTAL_ABS (drying-treated maize) / PI_TOTAL_ABS (non-drying-treated maize) (after drying-treating maize once)] + 2log [PI_TOTAL_ABS (drying-treated maize) / PI_TOTAL_ABS (non-drying-treated maize) (after drying-treating maize twice)] + 2^n log [PI_drying-treated maize / PI_non-drying-treated maize (after drying-treating maize n times)]. The present numerical formula is conceived to obtain an index through a periodical observation for a predetermined period of time after performing the drying treatment process.