Analysis of Resistant Spectrum to Rice Blast in Transgenic Rice Lines Introduced Lysozyme Gene from T4 Phage

The receptor cultivar Nan29 and thirty-six T5 rice lines derived from ten T0 generation transgenic plants harboring lysozyme gene were challenged in the greenhouse by inoculating 63 isolates belonging to 48 races of Magnaporthe grisea from Yunnan Province. The transgenic rice lines exhibited resistance to more than 72% of isolates inoculated in this experiment, and 38.1% (24 isolates) of them could infect the receptor cultivar Nan29. The results indicated that the transgenic rice lines possessed wide-spectrum resistance against various rice blast races and the resistant spectrum of rice lines were different although some lines derived from same T0 plant. The transgenic rice lines exhibited also high resistance to leaf and neck blast in the disease field evaluation, but not all of resistant lines against leaf blast were resistant to neck blast.