RANK CORRELATIONS AMONG SOME STABILITY PARAMETERS FOR GRAIN YIELD IN BREAD WHEAT | ||
| Egyptian Journal of Plant Breeding | ||
| Article 8, Volume 24, Issue 1, March 2020, Pages 123-136 PDF (698.47 K) | ||
| Document Type: Original research | ||
| DOI: 10.12816/ejpb.2020.199310 | ||
| Abstract | ||
| The present study aimed to evaluate twelve bread wheat genotypes across 9 environments (the combinations of 3 seasons x 3 sowing dates) during 2015/2016, 2016/2017 and 2017/2018 at Kom ombo Agriculture Research Station, Agriculture Research center, Aswan Governorate, Egypt.Significant differences were observed among bread wheat genotypes for grain yield (ton/ha). Combined analysis of variance of grain yield across the nine environments showed a highly significant (p < 0.01) mean squares due to genotypes (G), environments (E) and genotypes x environments interaction (GEI), indicating differential response of genotypes across studied environments and the validity of stability analysis. Six parametric of stability statistics were performed ( , bi , S2di , Ri2, Wi 2 and S2i). Stability analyses for grain yield of wheat genotypes revealed that the genotypes: Line#2, Sakha 95 and Line#1 were more stable than others, expressed in 5, 4, and 3 out of all 6 stability statistics used, respectively. Thus, these genotypes could be suggested to be more stable than others for these measures. They have a low contribution to GEI. Therefore, the above mentioned genotypes could be recommended as stable and/or incorporated in any future breeding programs aiming to produce lines of bread wheat. Rank correlation among stability measures showed that ecovalance (W2i%) was positively correlated with coefficient of regression (bi), deviation mean squares from regression (S2di) and coefficient of determination (R2) | ||
| Keywords | ||
| Bread wheat; Triticum aestivum L; Genotype x environment interaction; Stability; Rank correlations | ||
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