INDUCTION AND IDENTIFICATION OF TEMPERATURE-SENSITIVE ALBINO GENES ININDICA RICE (ORYZA-SATIVA L)

LCM2 and LCM3 were two albino mutants induced from a temperature-sensi tive genetic male sterile (TG(M) over dot S) line 2177s, with the trea tment of 300 Gy gamma irradiation. The albino phenotype of two mutants expressed either under high or low temperatures, while normal green l eaves developed under low or high temperatures, respectively. Genetic analysis indicated that each mutant was controlled by a single recessi ve nuclear gene. The albino phenotype was affected by the exogenous ap plication of reduced sugar, such as glucose, sucrose and maltose. Afte r treatment, the albino leaves recovered to be greenish when compared with normal green leaves. The results suggested that two mutants be an ideal system in understanding gene expression regulated by temperatur e.