Mal’chikov P. N., Myasnikova M. G.
Samara Federal Research Scientific Center RAS, Samara Scientific Research Agriculture Institute named after N. M. Tulaykov, ul. K. Marksa, 41, pos. Bezenchuk, Bezenchukskii r-n, Samarskaya obl., 446254, Russian Federation
Abstract. The aim of the study was to select a set of breeding backgrounds formed by the environmental conditions of geographic points, for breeding adapted durum wheat varieties in the Steppe regions of Russia. We conducted two experiments. The first experiment was carried out in 2014–2015 in Volgograd, Bezenchuk, Kurgan, and Barnaul; in 2016 – in Bezenchuk, Barnaul, Aktyubinsk, and Orenburg; and in 2017 – in Barnaul and Bezenchuk. The second experiment was carried out in 2011–2012 in Aktyubinsk, Bezenchuk, Omsk, and Barnaul. We assessed the parameters proposed by A.V. Kilchevsky and L.V. Khotyleva: effect of the environment (dk), variance of the interaction of the environment with genotypes (sigma2(G*E)ek), differentiating ability (sigmaDAEk), relative differentiating ability (Sek), typicality (tk), and predictability of the environment (Pk). For the distribution of backgrounds into groups, we used the data obtained on the basis of factor analysis and biplot graphs. In the first experiment, three groups were identified. The first group was with the effects of trait stabilization (dk = 15.05; sigmaDAEk = 3.63; Sek = 9.44; tk = 0.56; Pk = 0.05) and included Barnaul (2014, 2015, 2017) and Bezenchuk (2017) sites. The third group with a destabilizing effect (dk = -7.33; sigma2(G*E)ek = 57.6; sigmaDAEk = 3.93; Sek = 30.4; tk = 0.53; Pk = 0.15) included Volgograd (2014, 2015), Kurgan (2014, 2015), Bezenchuk (2015, 2016), and Barnaul (2016). Intermediate properties were noted in Bezenchuk in 2014. In the second experiment, four groups of environments were identified. The first group included Omsk (2012) and Barnaul (2012), favourable for breeding highly productive forms (dk = 17.2; sigmaDAEk = 4.2; Sek = 11.0; tk = 0.64; Pk = 0.08). The second group included stabilizing environment (dk = 1.9; sigmaDAEk = 2.3; Sek = 11.0; tk = 0.64; Pk = 0.08) – Bezenchuk (2011) and Omsk (2012). The third group included Aktyubinsk (2011), Barnaul (2012), and Bezenchuk (2012), which form genotypes resistant to stress factors (dk = -8.8; sigmaDAEk = 2.0; Sek = 18.2; tk = 0.71; Pk = 0.14). In 2012, Aktyubinsk was assigned to levelling backgrounds (dk = -13.1; sigma2(G*E)ek = 0.61; sigmaDAEk = 0.62; Sek = 7.5; tk = 0.14; Pk = 0.01).
Keywords: durum wheat (Triticum durum Desf.); variety; environment; differentiating ability; environment typicality; environment predictability; biplot analysis.
Author Details: Mal’chikov P. N., D. Sc. (Agr.), chief research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); Myasnikova M. G., Cand. Sc. (Agr.), leading research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.).
For citation: Mal’chikov PN, Myasnikova MG. [Characteristics of the differentiating ability of the environment for the organization of ecological breeding of durum wheat in the steppe regions of Russia]. Dostizheniya nauki i tekhniki APK. 2020;34(11):67-72. Russian. doi: 10.24411/0235-2451-2020-11109.