The recommendation of sugarcane varieties that show superior performance in different locations is a challenge for breeders and crop managers due to the response of genotypes across environments. Researches on the stability of sugarcane genotypes under a twelve-months planting cycle are scarce. The objectives of this work were to assess the magnitude of the genotype x environment interaction and identify stable genotypes under this cycle. Phenotypic stability was estimated by two methods of analysis, linear regression coefficient and coefficient of variation. Ten genotypes and two control varieties were evaluated for stalk height, stalk diameter, stalk number per meter, pol% cane and yield of cane and sugar in three locations during the years 2004 and 2005. The results showed that there was genotype x environment interaction for stalk diameter, number of stalk and yield of cane and sugar, indicating that genotypes ranked differently at individual location. Number of stalk per meter was the biometric attribute more affected by the genotype x environment interaction. The genotypes IAC87-3396, IAC91-1099 and IACSP94-4004 can be recommended for planting under a twelve months cycle at Jaú, Piracicaba and São João da Boa Vista regions of São Paulo State, Brazil.
Saccharum sp.; environmental adaptability; biometric attributes; productivity; varieties
