DOI: https://doi.org/10.21498/2518-1017.13.3.2017.110710

Screening of winter triticale genotypes for resistance to salinity in the shoot apical meristem culture

С. В. Пикало, О. В. Дубровна

Abstract


Purpose. To conduct in vitro screening of different genotypes of winter triticale for resistance to salinity in the shoot apical meristem culture.

Methods. Plant tissue culture in vitro, in vitro breeding, statistical analysis.

Results. It was found that the increase of sodium chloride concentration from 0.6 to 1.5% resulted in inhibition of the callus culture growth in all genotypes that was indicative of the toxic effect of the stress factor. It turns out that 1.2% sodium chloride concentration allowed to differentiate triticale genotypes for salt tolerance. The line ‘38/1296’ appeared to be the most resistant to salinity stress because under breeding conditions calli of this genotype were characterized by higher morphogenetic potential, had the highest crude mass increase, and plants-regenerants were obtained only from explants of this line after cultivation on the medium containing 1.5% sodium chloride. The ‘ADM 11’ variety was the most sensitive to saline stress as mass necrosis and lack of regenerative ability in its calli were observed under breeding conditions. In the studied forms, genotypic dependence of morphogenesis processes in vitro culture was registered. From the induced calli, plants-regenerants were obtained, and their completion of growing, root development and transfer to in vivo conditions were optimized.

Conclusions. Genotypic response to salinity stress in the culture of shoot apical meristems of winter triticale was expressed by various crude mass increase and different morphogenetic potential on exposure to a stress factor. The line ‘38/1296’ can be used as a valuable material for further breeding of winter triticale. The culture of shoot apical meristems is recommended to apply as a test system for screening of triticale genotypes for resistance to salinity stress


Keywords


winter triticale; salinity stress; resistance; callus

References


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GOST Style Citations


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DOI: 10.21498/2518-1017

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