Evaluation of ear yield stability of organic sweet corn hybrids at different elevations in the humid tropical climate of Indonesia
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Abstract
Yield trials are an important step in a breeding program to evaluate the performance of selected genotypes under various environments. In this study, the ear yield stability and adaptability of ten experimental sweet corn hybrids bred for organic production was estimated using the AMMI model. The combined analysis of variance indicated that the location effect (E) was a primary source of variation in ear yield (35%), followed by hybrid (G) and hybrid-location interaction (GEI) effects, which accounted for 27% and 16%, respectively. Among the tested locations, highland was identified as the most productive environment. However, the significant GEI effect suggests a possible inconsistency in the ear yield among the hybrids across elevations. Both the estimates of AMMI stability value (ASV) and yield stability index (YSI) indicate that the experimental hybrid from the cross of Caps-5 x Caps-22, as followed by check of commercial hybrid Paragon, could serve as the most suitable hybrids for organically growing sweet corn under different elevation in the humid tropical climate of Indonesia.
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