Stability And Adaptability Of Cotton (Gossypium Hirsutum L.) Genotypes Under Multi Environmental Conditions In Mozambique

Abstract

Cotton ( Gossypium hirsutum ), is an important crop in many developing countries. The crop yield is fundamentally dependent on the environment in which it is grown. One of the major challenges for cultivar recommendation is the genotype by environment interac- tion when the performance ranking of genotypes over environments is not constant. The identification of cultivars with high adaptabil - ity and stability to the growing conditions is an option to deal with this fact. The objective of the present study was to assess the yield stability and adaptability of cotton ( Gossypium hirsutum L.) genotypes under multi environmental conditions in Mozambique. The trials were established over two years (2014/15 and 2015/16) in Namialo, Cuamba and Balama, in a total of six environments. The plots were established in a randomized complete block design with three replicates of eighteen treatments. The stability and adaptability were assessed using the AMMI (Additive Main Effect and Multiplicative Interaction) multivariate method. The results showed that the most productive new genotype in terms of seed cotton yield was IP63. Among the introduced new genotypes, the Brazilian IMACD 06-6798 were classified as the most stable followed by the other Brazilian IMA1 08-3917 and the Turkish BA 919 compared to the local CIMSAN1 and the Zambian Churedza. The results suggest that the genotypes IMACD 06-6798, IMA1 08-3917 and BA 919 may be recommended for cultivation in Mozambique, since they presented an acceptable adaptability and potential stability. BA 919 The they