Abstract
The genetic control of dwarfism was studied in the mutants induced by the chemical mutagen ethyl methanesultanate in a tall indica rice (Oryza sativa L.) cultivar, ‘Tellakathera’. The five dwarfs were, dwarf‐6(d0), dwarf‐ 7(d7), dwarf‐8(d8), dwarf‐9(d9), and dwarf‐10(d10). In crosses of the dwarfs with the tall parent, F1 plants were tall and the F2 plants segregated three tall to one dwarf, suggesting that each of these dwarfs is controlled by a single recessive gene. Crosses among the dwarfs produced tall F1, plants and a dihybrid segregation pattern of nine tall to seven dwarf plants in F2, indicating these five dwarfing gene loci were nonallelic to each other.
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