Stability and adaptability of herbaceum cotton in the Cerrado of Mato Grosso and Mato Grosso do Sul, Brazil

The objective of this work was to analyze stability and adaptability, and to group environments with productivity data of eight cotton genotypes in 16 environments of Cerrado of Mato Grosso and Mato Grosso do Sul, Brazil, in 1998/1999 harvest. Statistical model.,used was the simple square 8x8. The individual and combined statistical analysis were performed by considering genotype and environment effects fixed. Parameters of the cultivars or lines were evaluated by the covalence, method and by the AMMI procedure. The lineage CNPA 94773 was the stablest and most adapted to environmental conditions. There was a positive specific adaptability and interaction of the genotypes with the environments: CNPA ITA 90 cultivar (Campo Novo dos Parecis, Chapadao do Sul, Sorriso, Itiquira and Sapezal); ITA 96, FMT Fetagri and FMT Saturno, (Rondonopolis and Pedra Preta); BRS 197 (Nova Mutum, Primavera do Leste and Campo Verde); BRS FACUAL (Quatro Marcos and Campo Verde); CNPA 94773 (Ponta Pora, Sapezal, Alto Taquari and Lucas do Rio Verde) and BRS Antares (Ponta Pora, Alto Taquari and Lucas do Rio Verde).