Bulgarian Journal of Agricultural Science
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Application of genotype by yield trait biplot approach for selection of winter barley varieties
Nikolay Dyulgerov, Boryana Dyulgerova
Abstract: The aim of the study was to use the genotype by yield trait (GYT) biplot method to select superior winter barley varieties, based on yield-trait combinations under rain-fed conditions. In the experimental field of the Institute of Agriculture – Karnobat, Bulgaia, 17 varieties of winter barley were evaluated in a complete block design with four replications in three growing seasons (2019/2019, 2019/2020, and 2020/2021). Based on the GT biplot and Pearson’s correlations, a positive correlation of grain yield with lodging resistance and the number of spikes per 1 m2 and a negative correlation of grain yield and plant height and 1000-grain weight were found. The result of polygon view of GYT biplot showed that varieties IZ Bori (G4), Casino (G6), and Zemela (G17) had the high levels of most of the studied yield by trait combinations. The Average Tester Coordination view of the GYT biplot identified as the best-ranked varieties Casino (G6), IZ Bori (G4) followed by Zemela (G17), and Bojin (G3). The results of the present study showed that the GYT biplot approach can help visual identification of the genotypes with the best combination of yield with other traits and could improve the genotype selection, based on multiple traits in the feed barley breeding program.
Keywords: barley; GYT biplot; yield-trait combinations
Citation: Dyulgerov, N. & Dyulgerova, B. (2023). Application of genotype by yield* trait biplot approach for selection of winter barley varieties. Bulg. J. Agric. Sci.,29(6), 1096–1102.
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Date published: 2023-12-15
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