Estabilidad fenotípica de genotipos de algodón (Gossypium hirsutum L.) en el Caribe Colombiano

Cotton is the main crop of the second term of the year in the Colombian Northern Coast. It grows under variable environmental and technological conditions that affect cultivar fiber yield and the competitiveness of the production system. The main objective of this research was to analyze the phenotypic stability of the fiber yield of ten cotton genotypes in eight environments of the Atlantic Coast. A complete randomized block design with four replicates was used in all experiments. The stability analysis was made by means of the methodologies proposed by Lin & Binns (1988) and Carneiro (1998). The combined variance analysis detected significant interaction genotype-environment (p<0.01), as reflected in the change of the superiority of genotypes from an environment to another. According to the methodology employed, the cultivars L. Cesar -151 and Delta opal showed the best results, since they presented the lowest Pig values (more stable) and the higher average fiber yield. The methodology of Carneiro (1998) selected, due to greater phenotypic stability and yields, L. Cesar-151 and Delta Opal for better environmental conditions and Cesar-149 and Corpoica M-123 for less favorable environments.