Productivity and stability characteristics of winter hexaploid triticale cultivars with different geographical origins. II. Yield modelling and comparison of genotypes groups
DOI:
https://doi.org/10.61308/UWJB4580Keywords:
modeled productivity; geographic origin; complex stability; triticale; relative yieldAbstract
In order to develop, propose and apply a method for comparing the productivity and stability of triticale genotypes with different geographical origins, two collections of 14 Bulgarian and 17 Polish varieties of the crop were studied in 4 contrasting growing periods (2019/2020; 2020/2021; 2021/2022; 2022/2023). A model based on relative yield was developed, applied and evaluated for analyzing the productive capabilities of a given genotype to realize the productivity over the average yields when studying geographically differentiated sets of genotypes. The stability parameters of the modeled yield were determined according to the methods of Eberhart and Russell, Shukla, Wricke, AMMI stability analysis and Environment Adjusted Yield Model. The productivity results exhibit that the applied model and the results for the modeled yield allow the studied sets of Bulgarian and Polish varieties to be compared with each other, as well as to compare the individual genotypes between the two groups with different geographical origins. With the highest modeled productivity are characterized varieties Salto, Toledo, Kasyno, Teran and Boomerang. The highest complex stability based on the modeled yield was established for the varieties Boomerang, Irnik, Blagovest, Trapero and Remiko, while low complex stability is found for Musala, Silverado, Kasyno and Algoso. When assessing the stability of the individual groups, all used parameters based on the modeled yield show that under the studied environmental conditions, the Bulgarian varieties are characterized by higher stability compared to the Polish ones.
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