Variability of the main breeding traits of sorgo CMS lines depending on the weather conditions of the Saratov region

Determining the nature of interaction between genotype and environment is one critical stages breeding practice for selecting effective parental forms hybrids first generation sorghum their stable seed reproduction in arid conditions Saratov region. The contribution regulated unregulated factors to overall variability a trait can be determined using two-factor analysis variance used this work. research objects were 11 sterile lines grain grown on experimental field Federal State Budgetary Research Institution RosRISM (Russian Institute Sorghum Maize) “Rossorgo” during 2009–2018. meteorological plant cultivation varied significantly: 2013 2017, they characterised as sufficiently humid (Hydrothermal coefficient - HTC = 0.98–1.01), 2011 – acutely dry (HTC 0.26), other years 0.45–0.68). As result tests, it was found that CMS differed economically valuable traits. line A1 Efremovskoe 2 should classified tall (131.2 cm) more productive (4.41 t/ha seeds) with well-developed leaf apparatus (the area giant 238.0 cm2). Low-growing M35 9E Pishchevoe 614 (94.9–98.5 distinguished by protrusion inflorescence stem 21.6 cm, A3, A4 Zheltozernoe 10 (109.8–110.2 long (50.7–51.5 cm). Medium-sized A2 Vostorga KP 70 had (23.0–24.5 cm), while A3 Feterita 14 short (13.7 It (41.4–61.6%) substantial effect height, length inflorescence, length, environmental factor yield (55.3%).