Genetic control of meiosis in rice, Oryza sativa L.

I. Classification of meiotic mutants induced by MNU and their cytogenetical characteristics

Abstract

Twenty-five meiotic mutants were selected from 281 sterile mutants induced by the treatment of the fertilized egg cells of rice with N-methy-N-nitrosourea. Of these, 19 were desynaptic and asynaptic mutants. In addition other meiotic mutants showing vacuolation of cytoplasm, incomplete cytokinesis, arrest of meiosis and degeneration and fused meiocytes were also obtained. Each of these mutants was governed by a single recessive gene.