Triticale lines combining high productivity with stability and adaptability under contrasting environments

Hristo Stoyanov, Valentin Baychev

Abstract: With the aim to evaluate the productivity and its combination with high stability and adaptability, twelve winter hexaploid triticale lines were studied under six contrasting periods of growing. The evaluation of productivity was based on the comparison of the genotypes to local triticale checks: AD-7291, Vihren & Rakita. To assess the productivity potential of the lines in comparison to the world tendencies, the world checks in this crop Lasko and Presto were also involved. The stability and adaptability of the lines were determined by the model of Eberhart and Russell. The investigated triticale lines were characterized by extremely high productivity potential, which, averaged for the period, exceeded both the local and the world checks. The highest productivity was determined in line G8, and the highest productivity for a specific period – in line G12. The stability of the studied lines was significantly higher than the world checks Lasko and Presto, reading the highest stability in lines G5, G6 and G7. A good combination of above-the-average productivity and adaptability to the more favorable growing conditions was found in lines G2, G3, G4, G5, G7, G8, G9 and G12. The best combination of high stability, wide adaptability and high productivity was observed in line G7. On the other hand, line G12 was characterized by high stability,and G11 was with very good adaptability to the unfavorable conditions of the environment. These characteristics make the investigated lines particularly suitable for the varied soil and climatic conditions of Bulgaria.

Keywords: adaptability; lines; productivity; stability; triticale

Date published: 2021-10-28