Productivity and biochemical seed quality of soybean breeding material

Abstract

Study Purpose. Evaluation and identification of valuable breeding soybean lines in terms of yield capacity as well as protein and oil contents in seeds.

Methods, source material. The investigations were carried out at the Plant Production Institute nd. a V.Ya. Yuryev of NAAS in 2011-2013. Experiments were laid down as a competitive variety trial with the accounting area of 25 m² in four replications. The study material was breeding lines and the standard variety Diona. Protein and oil contents in seeds were measured using an infrared analyzer Infralum FT -10.

Results. The studies identified valuable breeding lines characterized by stable high yield capacity of seeds. As a result of intravarietal selection the lines 68-13 and 95-13 with the protein content of 42.0 % and 41.2 % in seeds (which is 9.0% and 11.1 % higher than the standard), respectively, were created; in addition, they exceeded the standard Diona in seed yield capacity by 53.0 % and 50.6 %, respectively, in oil content by 2.1% and 1.0 %, respectively. The lines 68-13 and 95-13 will be included in a further breeding process to create high-protein soybean varieties.

Conclusions. The lines created are characterized by insufficiently high plasticity of oil content, and due to a low stability of the year-to-year reproduction of this trait, they can only have a narrow specific breeding value, indicating the need in further, targeted breeding work with soybean to increase its environmental plasticity of oil content.