'W25' is an albino mutant line with possibilities of greening. The mutant was developed (in 1991) from a temperature-sensitive genie male sterile (TGMS) rice line '2177s' after treatment with 300 Gy gamma-rays. It is albino at the 1-2 leaf stage under low temperature with the possibility to turn green at the seedling stage, then albino and greenish during the later growth period. The following characteristic of the mutant has been proven: Stability to environment