Genetic analysis
Genetic analysis showed that F, plants from the reciprocal crosses of 'W25' with '2177s' exhibited a normal green colour, and the segregation ratio of normal plants to albino mutants well fitted the expected Tatio of 3:1 in the F, population, which indicated that the albino character of the 'W25' mutant is controlled by a recessive nuclear gene. RAPD analysis of 'W25' and '2177s' showed that there were two DNA band differences.