R. A. Maksimov
Ural Agricultural Research Institute, branch of the Ural Federal Agrarian Scientific Center, Ural branch, Russian Academy of Sciences, ul. Glavnaya, 21, Istok, Ekaterinburg, 620061, Russian Federation
Abstract. he purpose of the study was to determine the adaptability parameters in different growth and development periods of spring barley plants for the development of a method for predicting the biological yield of grain, depending on the effects of quantitative traits. The experiments were conducted in 2011–2020 in the southwest of the Sverdlovsk region. We considered the yield and biometric indicators of quantitative traits of various culture genotypes (Veresk, Pamyati Chepeleva, Acha, Binom, Sonet, and Bagrets). Using Pamyati Chepeleva variety, based on an assessment of the biological grain yield, according to the generally accepted methodology of Kilchevsky and Khotyleva (1985), we revealed a relatively high general adaptability (vi was 0.34). In the new interpretation, the general adaptability was differentiated according to the phases of plant growth and development, which was expressed by the indicator WIAki (a weighted indicator of the adaptability of the effect of the k-th trait). The total effect (the sum of WIAkis), depending on the effects of quantitative traits, was 0.35 and was approximately equal to the vi indicator – 0.34 (a difference of 3.0%). At the same time, Pamyati Chepeleva variety provided a guaranteed high grain yield in any test year since it was characterized by the best stability indicator (sigmaGAPi was 1.03). That is, it is a genotype valuable for breeding in the Middle Urals (BVGi was 3.38), which is ensured by the breeding value of its quantitative traits that form the grain yield (BVTki was 1.04–1.22). The adaptive response of this genotype was predicted under relatively stressful conditions – during all periods of plant growth and development, we noted an increase in the adaptive response. WIAki increased depending on the determination period by 0.12–0.19. In relatively more favourable conditions, Pamyati Chepeleva, on the contrary, became less adaptive relatively to the presented set of varieties (WIAki decreased by 0.14–0.20).
Keywords: barley (Hordeum vulgare L.); quantitative traits; productivity; 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.).
For citation: Maksimov RA. [Method for determining the adaptability parameters using multiple regression analysis of the correlation between yield and its structural elements]. Dostizheniya nauki i tekhniki APK. 2021;35(6):4-10. Russian. doi: 10.24411/0235-2451-2021-10601.