Directorate of Research, Haryana Agricultural University, Hisar 125004.
Two dosages of X rays, 2S and 3S kR, were used to irradiate seeds of soybean variety Cobb. Eleven M4 mutants were identified whose roots nodulated and which yielded higher than control. The mutants also revealed variation for pods/plant, seeds/pod, reproductive period, 100-seed weight, and were early maturing. The mutant P18 outyielded the parent variety Cobb by 29.9%.
Irradiation, nodulation, Rhizobium strain, specificity, reproductive periods, inoculants
