MOHAMMADİ, Mohtasham Dryland Agricultural Research Institute, ايران , KARİMİZADEH, Rahmatollah Dryland Agricultural Research Institute, ايران , SABAGHNİA, Naser university of maragheh - Faculty of Agriculture - Department of Agronomy and Plant Breeding, مراغه, ايران , SHEFAZADEH, Mohammad Kazem islamic azad university - Department of Agronomy, ايران

Estimating genotypic ranks by several nonparametric stability statistics in Barley (Hordeum vulgare L.)

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Assessment of the yield stability of genotypes to various test environments is useful for recommending them for farmers and should be a requirement in plant breeding programs. Sixteen barley (Hordeum vulgare L.) genotypes were tested at four research locations for three years. The trials involved a randomized complete block design with four replications in which seven nonparametric stability statistics were used to analyze yield stability. The combined analysis of variance indicated the significance of the main effects of environments and genotypes as well as genotype by environment interaction. The overall mean grain yield for all the genotypes ranged from 3804.91 kg ha^-1 for G1 to 3119.27kg ha^-1 for G13. The most stable genotypes based on the S1 and S2 nonparametric stability statistics, were G7, G10 and G11 while the most stable genotypes based on the S3, S4, S5 and S7 statistics, were G4, G5 and G10. Regarding mean yield, it could be grasped that genotype G10 (3560.91 kg ha^-1) was the most favorable genotype. In this study, none of the nonparametric stability statistics were positively associated with high mean yield, and instead characterized a static concept of stability. The results of factor analysis and correlation analysis of the nonparametric stability statistics and mean yield indicated that S1 and S2 would be useful for selecting for stability.

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Adaptability , Genotype by environment interaction , Multi , environment trials , Yield stability

Yuzuncu Yil University Journal Of Agricultural Sciences

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