STABILITY FOR GRAIN YIELD OF SOME PROMISING MAIZE HYBRIDS | ||||
| Egyptian Journal of Plant Breeding | ||||
| Article 4, Volume 24, Issue 1, March 2020, Page 55-63 PDF (673.27 K) | ||||
| Document Type: Original research | ||||
| DOI: 10.12816/ejpb.2020.199306 | ||||
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| Abstract | ||||
| Grain yield stability for the new maize hybrids is an important target in breeding programs. This study was carried out to identify the stable superior hybrids for grain yield across different environments in Egypt. Nine crosses along with the two commercial yellow single crosses, SC 162 and SC 168 were evaluated in 2018 season in on-farm trails at eleven locations (environments) across Egypt. These trails were the last stage evaluation of new maize hybrids registration in Egypt. A randomized complete block design with 6 replications was used. Plot size was 4 rows, 6 m long, 0.70 m apart and 0.24 m between hills. Results showed that mean squares due to environments (E), hybrids (H) and their interaction (HEI) were highly significant for grain yield. Environments (E) explained 73.07% of the total (E + H + HEI) variation, whereas (H) and (HEI) accounted for 5.68 and 21.25%, respectively. The promising hybrids H-1, H-3, H-5, H-6, H-7, H-8 and H-9 were significantly or not significantly superior to the better check for grain yield. According to maize registration rules in Egypt, these hybrids might be recommended to be released as new hybrids. However, this study suggests hybrids H-1, H-3, H-5 and H-7 because these hybrids had both high grain yield and stability performance under different environments. | ||||
| Keywords | ||||
| Maize; Yield; Stability parameters; Single crosses; G x E interaction | ||||
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