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• Results of fast neutron induced mutations in M1 and M2 generations of sorghum (Sorghum bicolour)

  49-54

  Pál Pepó

  Éva Erdei

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  Due to climatic barriers, the genetic variability of Sorghum varieties decreases away from the gene centre, therefore hybrids cultivated in Hungary are restricted to a relatively limited genetic basis. This limited genetic basis results in a lower rate of genetic improvement, so the genetic basis of cytoplasm factors are to be extended. We enhanced the diversity of primary materials by fast neutron treatment. As a result of this treatment we detected sterile, deformed specimens with double panicles in the stock treated with a dose of 12.5 Gy in the M₁ generation. Agronomically useful
  specimens were found in the stock treated with 10 Gy and 7.5 Gy doses, where the leaf area index (LAI) and Harvest- index gave higher values than those of the control group. In the stock treated with 5 Gy dose, variations were less significant. In the reseeded M₂ generation we detected albino specimens with extreme chlorophyll defects in the 10 Gy Zádor stock.