Amaranth variability at different doses of gamma radiation

Abstract

O.V. Hudym, S.V. Lymanska, T.I. Goptsiy, N.P. Turchynova, V.O. Mykhailenko, R.V. Kryvoruchenko, R.V. Rozhkov and S.V. Stankevych*

The article presents the variability in mutant generations of amaranth seed (Amaranthus hópochonacdrius L.) using different doses of gamma radiation. The negative effect of gamma irradiation on amaranth field germination plants of M1 was proved, which decreased with an increase in the mutagen dose (on average, it was 58-50% in the control variant, 49-55, and 2-3% respectively). Plants M1, which grew from seeds treated with mutagen, were characterized by moderate and significant depression of growth processes (a decrease in plant height and panicle length by an average of 10-15 cm compared to the control). Doses of gamma radiation of 400 and 700 Gy induced chlorophyll changes (Albina type), which led to a complete disruption of chlorophyll synthesis in plants. Gamma irradiation has been established to be one of the powerful factors that can significantly change the characteristics of amaranth plants. The changes are manifested in the form of non-hereditary morphoses M1 and mutant plants of M2 and M3 generations. Mutants were isolated in the studied amaranth varieties with increased seed productivity (by weight 1000 and by weight of seeds from a panicle, they exceeded the control by 0.07-0.12 g and 1.11 g, respectively). Mutations in the cultivars studied under the influence of gamma irradiation (150 Gy) can be used as marker traits when mutating amaranth.

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