R. A. Maksimov, Yu. A. Kiselev, E. A. Shadrina
Ural Federal Agricultural Scientific Center, Ural branch, Russian Academy of Sciences, ul. Belinskogo, 112 A, Ekaterinburg, 620142, Russian Federation
Abstract. The study of the barley collection (225 numbers) was carried out to obtain information on the adaptability of genotypes in different periods of plant growth and development. A new method of differentiating yields by growth and development phases, as well as determining the parameters of adaptive capacity based on additive mathematical models was used. The experiments were conducted in 2011–2021 in the southwest of the Sverdlovsk region. The dispersion in the genotype factor of the trait grain yield (1.2%) was significantly lower than that of the quantitative traits (the number of productive stems was 5.9%, the number of grains per spike was 24.0%, and the weight of 1000 grains was 20.2%). The applicability of additive models was justified by the coefficient ki, the value of which did not exceed 15%. The article presents the results for the ten most adaptive varieties. Among them highlighted selective-valuable (JTGi - 4.26-3.22). The determining criterion in the experiment was environmental stability, the value of which (σCACi) varied in the range of 3.26-4.26. Three mechanisms of adaptation of samples to growing conditions were identified. The first combined samples Vorsinsky and Aut 148. They were characterized by the best genetic system of environmental resistance throughout the entire growing season: the value of σCACki for Vorsinsky was 0.14-0.54, for Aut 148 – 0.57-0.76. The dynamics of general adaptation increased from the beginning to the end of the growing season – the weighted adaptability index (WAIki) was equal to -0.01-0.15 and 0.09-0.16, respectively. The second mechanism was typical for the Kripichny genotype – high environmental resistance at all stages of growth and development (σCAC2i – 0.52-0.74), but the dynamics of the general adaptation of the variety was "bell-shaped". At the beginning and at the end of the growing season it was not adaptive (WAI1i – - 0.37; WAI3i – -0.09), in the middle it was super adaptive (WAI2i – 0.73). The third mechanism was noted for the Raushan and Veles samples. At the beginning of the growing season, they were unstable (σCAC1i – 0.87-0.91), but their general adaptation was always positive and significant, especially depending on the effect of the number of grains per spike (WAI 2i – 0.21-0.22).
Keywords: barley (Hordeum vulgare L.); genetic collection; adaptive capacity; quantitative traits; yield; genotype; conditions.
Author Details: R. A. Maksimov, Cand. Sc. (Agr.), leading research fellow (е-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); Yu. A. Kiselev, research fellow; E. A. Shadrina, research fellow (е-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.).
For citation: Maksimov RA., Kiselev YuA, Shadrina EA. [Adaptive response of collection varieties of spring barley (Hordeum vulgare L.) under the conditions of the Middle Urals]. Dostizheniya nauki i tekhniki APK. 2022;36(4):35-40. Russian. doi: 10.53859/02352451_2022_36_4_35.