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Stability and adaptability of early maturing sugarcane clones by AMMI analysis

Keywords: Saccharum spp. , principal components , multivariate analysis , genotype x environment.

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Stability and adaptability of 14 early maturing sugarcane clones were evaluated at 11 locations in the State ofParaná, in the plant cane and ratoon cycles, by the AMMI method. By AMMI2, 59.44% cumulative variance was explained inplant cane and 54.22% in ratoon cane by the first two principal components of tons of pol per hectare (TPH). For genotypeRB966928 the TPH was medium to high, phenotypic stability high and adaptability general, recommending this early maturingclone with wide adaptability for northern Paraná. The genotype-environment interaction was lowest in Paranavaí andMandagua ú (most stable locations), where the ranking of genotypes was more reliable than the means of the environmentstested.


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