Characteristics of perspective lines common winter wheat. 1. Yield and stability

Zlatina Uhr, Evgeniy Dimitrov, Grozi Delchev

Abstract: The aim of the study is to evaluate the stability of the yields of perspective breeding lines of winter common wheat, breeded in IRGR - Sadovo. The breeding materials were tested by yield for three years (2017 - 2019) and were compared with the average standard (Sadovo 1 and Enola). The comparative experiments were performed according to a block scheme in four replications, with the size of the experimental plot of 10 m2 according to the cultivation technology adopted in IRGR. Yield data were processed by analysis of variance. The yield stability of the lines and candidate varieties of common winter wheat was assessed by the stability variants σi 2 and Si 2 according to Shukla (1972), ecovalence Wi according to Wricke (1962) and the criterion of phenotypic stability (Ysi) according to Kang (1993). The results of this study do it possible to make an even more complete assessment of the breeding materials. Phenotypic stability is especially important for the future realization of these candidate varieties in practice. The most valuable genotypes are MX 258-3355, MX 286-1777, RU 48-2553, RU 49-2300, Sashez, MX 286-1759, Ayilzla, MX 295-2524, Nany, MX 274-711, MX 265 -3430, MX 260-1175, MX 270-3461, MX289-2048 and MX 270-3464. These genotypes combine high values of grain yield and high stability of this trait.

Keywords: common winter wheat; perspective lines; stability; yields

Date published: 2021-08-20