Received: February 11th, 2023 ; Accepted: September 29th, 2023 ; Published: October 23rd, 2023 ; Correspondence: [email protected] of genotypes that can maintain a good yield and quality performance
under climatic variability is critical for ensuring future food security. The aim of this study was
to determine the stability of fifty-four durum wheat varieties with different geographical origins
conceming the traits grain yield and grain protein content by parametric and nonparametric
assessments. The varieties were tested in three consecutive years 2019–2021 in a randomized
block design in three replications. Four nonparametric stability assessment, four parametric
stability assessment, the coefficient of variation and the simulated assessment of yield and
stability by Kang were determined. The analysis of variance revealed a significant influence of
genotypes, environment and the genotype and environment interaction (GxE) on the expression
of both studied traits. The environment showed a greatest influence on the variation of both traits.
Eleven genotypes achieved average yield above 6.00 t ha-1
. The genotypes with a high average
yield and grain protein content and high stability as determined by the most stability assessments
were identified as Melina (BG), Raylidur (BG) and Beloslava (BG) - for grain yield and varieties
as Cesare and Beloslava (BG) - for grain protein content. The Bulgarian variety Beloslava was
the most valuable combination high yield and grain protein content along with high stability for
both traits across different seasons. Beloslava can be recommended for involvement in durum
wheat breeding programs for simultaneously improvement of productivity and grain quality and
to develop new durum wheat varieties well adapted to changing climate conditions
