Rice variety Kalanamak KN3 was treated with 0.25% and 0.50% doses of Etyhl Methane Sulfonate. In M₂ generation single plant progenies were separated into two groups. Progenies showing chlorophyll mutation namely albina, xantha, chlorina, zebra etc. were put in first group and remaining ones in the second group. Progenies in M₃ generation emanating from the first group had much higher and broad spectrum of mutants and only M₂ progenies with any type of chlorophyll mutants should be advanced.