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Evaluation of grain yield stability of bread wheat (Triticum aestivum L.) promising lines in warm and dry regions of Iran
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Abstract: (3255 Views) |
| Adaptation and grain yield stability of 16 promising lines of bread wheat toghether with cv. Chamran and cv. Aflak, two commercial cultivars as controls, was studied in six experimental field stations; Zabol, Ahwaz, Darab, Dezful, Iranshahr, Khorramabad, Iran for two successive cropping cycle (2012 –14). The experiments were conducted using randomized complete block design with three replications. The results showed that 81 percent of total variation observed for grain yield was related to environmental effects, 3 percent to genotype effect and 16 percent to G×E interaction. The polygon-view of GGE biplot led to the identification of eight superior lines (lines no. G14, G12, G15, G11 and G16) and two mega-environments. Among the test locations, Zabol and Dezful had a high discriminating ability to show differences between the lines and cultivars at ideal environment. Simultaneous evaluation of grain yield and stability through average environment coordinate (AEC) biplot showed that lines no. G14 (S-91-14), G12 (S-91-12), G15 (S-91-15), G9 (S-91-9) and G13 (S-91-13) with the higher grain yield (6167, 6102, 6315, 6131 and 6252 kg.ha-1, respectively) were the most stable lines. Finally, lines S-91-15 and S-91-13 with higher yield and wide adaptation were selected as the superior lines for being release as new commercial bread wheat cultivars. |
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| Keywords: Bread wheat, Genotype × environment interaction, GGE biplot and Stability parameters |
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Full-Text [PDF 842 kb]
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2018/05/30 | Accepted: 2018/05/30 | Published: 2018/05/30
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