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2014, vol. 51, iss. 3, pp. 154-160
Comparison of biplot analysis and Kang's YSi statistic in estimating maize hybrids stability
Institute of Field and Vegetable Crops, Novi Sad
Keywords: GGL biplot; grain yield; hybrids; maize; yield stability; YSi statistics
Integration of mean yield and stability evaluation into a single analysis is practical for maize hybrids recommendation and approval in multi-environment trials. The objective of this study was (i) to investigate grain yield performance and stability of 21 experimental maize hybrids via the use of the Kang's yield-stability statistics (YSi) and via the sites regression biplot (GGL) from multi-location trial conducted in Serbia; and (ii) to determine if hybrids yield stability was influenced by the linear effect of an environmental index. Hybrid main effect was highly significant and captured 9% of total sum of squares. Hybrid × location interaction was highly significant and accounted for 8.1% of the total sum of squares. Heterogeneity caused by environmental index was statistically non-significant. The same genotypes were recognized as stable by YSi and GGL biplot, but we recommend the sites regression biplot as more informative and precise tool for simultaneous hybrids mean performance and stability estimation.
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article language: English
document type: Original Scientific Paper
DOI: 10.5937/ratpov51-6208
published in SCIndeks: 20/03/2015
peer review method: double-blind

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