Abstract
Richer genetic diversities in leaf color mutations were detected in temperature-sensitive male sterile (TSGMS) line 2177S after gamma-irradiation treatment. According to temperature response, it could be classified into two types. In temperature-insensitive type, some mutations expressed during the whole growth period, some only at specific developmental stage. Further observation indicated that some mutants could be recovered to normal green, some only partly greenish. However, temperature-sensitive mutants only expressed under specific higher or lower temperatures. Biological effect analysis revealed that expression of some mutations would induce rice plant lethal. It was also observed that some exotic substances could mediate leaf color phenotype effectively. Genetic research showed that a single recessive nuclear gene controlled the leaf color phenotype. Allele test demonstrated there were richer genetic diversities in loci controlling these mutations.
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