Stability Analysis of Bread Wheat Genotypes for Heading Time and Grain Yield Using AMMI Model | ||||
| Assiut Journal of Agricultural Sciences | ||||
| Article 2, Volume 51, Issue 2, July 2020, Page 24-42 PDF (1.15 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajas.2020.115950 | ||||
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| Abstract | ||||
| Additive main effects and multiplicative interactions (AMMI) model analyses were performed to assess and quantify the magnitude of genotype by environment interaction (GEI) for number of days to heading (DH) and grain yield (GY/P) stability of sixteen promising bread wheat (Triticum aestivum L.) genotypes. Field experiments under recommended (N) and late (L) sowing date in newly reclaimed soil were conducted in the Agricultural Research Station at Arab-Elawamer, Assiut, Egypt for three consecutive seasons (2016/2017, 2017/2018 and 2018/2019). The combined ANOVA showed highly significant differences among genotypes and among environments for both traits, while GEI was highly significant for DH and not significant for GY/P. Results of AMMI analysis indicated that the first three AMMI (PC1, PC2 and PC3) were highly significant for DH and AMMI1 was only significant in case of GY/P. In addition, the environments showed high contributions to the total sum of squares (TSS) and explained 84.7 and 85.3% for days to heading and grain yield/plot, respectively. While, the genotypes captured 10.4 and 6.8% of the TSS for the same traits, respectively. Although that the GEI showed low contribution to the total SS, but its magnitude (7.9%) was larger than that for genotypes in case of GY/P. The AMMI stability value discriminated genotypes G3, G7, G9, G12 and G14. G3 were the most promising stable and adapted genotypes according to grain yield performance over environments. | ||||
| Keywords | ||||
| AMMI model; AMMI stability value; Bread Wheat; Sowing dates | ||||
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