1Gaziantep University, Vocational School of Higher Education in Nurdagi, 27840Nurdagi/Gaziantep/Türkiye
*Corresponding Author: Alihan Cokkizgin, Gaziantep University, Vocational School of Higher Education in Nurdagi, 27840Nurdagi/ Gaziantep/Türkiye, Email: acokkizgin@hotmail.com
Online published on 29 January, 2026.
Evaluating genotype performance in target environments is crucial for crop improvement. This preliminary study was conducted to assess the seed yield, stability and adaptation of seven common bean genotypes in two contrasting agro-ecologies in Turkey: the cool, high-altitude environment of Bayburt and the hot, lowland environment of Kahramanmaras.
Field trials were conducted in Bayburt (2019) and Kahramanmaras (2021) using a randomized complete block design. Data were analyzed using combined analysis of variance, GGE biplot and Wricke's Ecovalence (W2i).
Our investigations revealed significant effects for genotype (G), environment (E) and their interaction (G×E), confirming that genotypes responded differently to the test environments. The GGE biplot analysis showed that the Suludere genotype was the top performer in Bayburt, whereas Mollakoy and Aydintepe genotypes were superior in Kahramanmaras. According to Wricke's Ecovalence analysis, Yukarikirzi was the most stable genotype, while Suludere was the least stable, confirming its specific adaptation. The Mollakoy genotype was identified as a desirable genotype, combining high average yield with relative stability. These preliminary findings highlight the importance of targeted genotype selection. ‘Mollakoy’ is a promising candidate for broader evaluation, while ‘Suludere’ appears specifically adapted to cooler, high-altitude conditions similar to Bayburt.
Adaptation, Genotype × Environment interaction, GGE biplot, Seed yield, Wricke's ecovalence
