Indian Society of Genetics & Plant Breeding

Standardization of GR50 dose of gamma rays for mutation breeding experiments in safflower (Carthamus tinctorious L.)

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GR50 dose of gamma rays was optimized in four different
genotypes of safflower.
In vitro experiment during seedling
stage detected very high GR
50 value of 579.2 Gy based on
reduction of root length. Field experiments on four
genotypes revealed significant difference in GR
50 values
among safflower genotypes. The GR
50 values varied in
between 248.7 to 374.3 Gy based on the seedling height
data at 42 days after sowing. RVS 2012-13 was most sensitive
to radiation, while Annegiri 1 was the tolerant.An optimal
dose of 300 Gy was found suitable for large scale mutation
breeding experiments in safflower.

Keywords: Gamma rays, GR50 dose, Mutation breeding, Mutation frequency, Safflower


Year: 2021
Volume: 81
Issue: 3
Article DOI: 10.31742/IJGPB.81.3.17
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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