Abstract
In order to increase the bread wheat (Triticum aestivum L.) tolerance to different biotic and abiotic stress factors, the development of new genotypes using the introgressions of the genomic fragments from other cereals is widely used. One of the most significant abiotic environmental factors that impede the expansion of the wheat cultivation territory is soil salinity. Salt-sensitive wheat varieties have poor yield and impaired grain quality when exposed to salinity. The aim of the present study was the establishment of a degree of influence of the alien genetic material on the salinity tolerance of bread wheat T. aestivum seedlings. The method of laboratory screening of the seedling salinity tolerance was used for the analysis of introgression lines carrying single fragments from Aegilops speltoides and T. timopheevii in bread wheat chromosomes 2A, 5B, and 6B.The initial parental forms of the spring bread wheat (Saratovskaya 29, Novosibirskaya 29, and Rodina-1) with moderate salt tolerance were used as the control. As a result of the estimation, it was established that the presence of the T5BS ⋅ 5BL-5SL translocation in the genome of Novosibirskaya 29 and Rodina-1 increased salt tolerance. On the contrary, another translocation from Ae. speltoides (T6BS • 6BL-6SL) is associated with a reduction in the tolerance. Different T. timopheevii genome fragments also differently affected the salt tolerance; introgression in chromosome 2A increased, while in 5B considerably decreased the wheat tolerance to the salinization. The observed differences between the initial wheat genotypes and introgression lines derived from them are discussed taking into account the localization of alien introgressions in the studied lines and the localization of the known genes (controlling the salt tolerance) in wheat chromosomes. It is assumed that a previously undescribed gene, which influences wheat seedlings salt tolerance, is located distal to the Xgwm0604 marker on the long arm of chromosome 5B.
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Original Russian Text © R.S. Yudina, I.N. Leonova, E.A. Salina, E.K. Khlestkina, 2015, published in Vavilovskii Zhurnal Genetiki i Selektsii, 2015, Vol. 19, No. 2, pp. 171–175.
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Yudina, R.S., Leonova, I.N., Salina, E.A. et al. Change in salt tolerance of bread wheat as a result of the introgression of the genetic material of Aegilops speltoides and Triticum timopheevii . Russ J Genet Appl Res 6, 244–248 (2016). https://doi.org/10.1134/S2079059716030151
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DOI: https://doi.org/10.1134/S2079059716030151