Viviparous Mutants in Rice, Oryza sativa L.

Abstract

Viviparous mutants were obtained among M₂ progenies of rice cultivars, Nihonmasari, Norin 8 and Koshihikari after EMS, gamma ray or thermal neutron mutagenesis. Frequencies of germinated seeds on panicles in these mutants ranged from 9.94 to 23.56 % in 1990 and from 4.43 to 24.88 % in 1991. Single recessive genes were assumed in all the mutants based on the analysis of genetic segregation of viviparous mutants in their progenies.