Abstract
Studies on the adaptability and stability are fundamental for plant breeding as they are an alternative to reduce the effects of genotypes x environments interaction (GxE). Moreover, they help identify cultivars with predictable behavior, which are responsive to environmental improvements, subsidizing cultivar recommendation. This study aimed to investigate the genotypes x environments interaction in cotton genotypes grown in the Brazilian Cerrado and identify genotypes for favorable and unfavorable environments. During the 2013/2014 and 2014/2015 seasons, 19 competition trials were carried out with cotton in a randomized block design, with 12 treatments, and four replications. The traits cotton seed yield, fiber percentage, fiber length, and fiber strength were evaluated. Results revealed significant GxE interaction for all the fiber traits evaluated. Genotype BRS 369 RF revealed general adaptability and high predictability for the fiber traits evaluated.
Highlights
The production and release of cotton cultivars (Gossypium hirsutum) in Brazil rely on the producers’ demands, who aim to meet the requirements of the textile industry (MORELLO et al 2010, MORELLO et al 2012, MORELLO et al 2015)
This study aimed to evaluate the genotypes x environments interaction (GxE) interaction in cotton genotypes grown in the Brazilian Cerrado and identify genotypes for favorable and unfavorable environments
The presence of the GxE interaction indicated the existence of variability of genotypes behavior throughout the environments for all the evaluated traits
Summary
The production and release of cotton cultivars (Gossypium hirsutum) in Brazil rely on the producers’ demands, who aim to meet the requirements of the textile industry (MORELLO et al 2010, MORELLO et al 2012, MORELLO et al 2015). The differential behavior of a genotype for a given trait in function of the environmental variation is defined as genotypes x environments interaction (GxE). Investigating this interaction is crucial for precisely recommending the best genotypes for a given region. The Cerrado biome occupies about 22% of the national territory and has peculiar climatic characteristics regarding rainfall regime, temperature, relative humidity of the air, and different types of soil. For these reasons, the GxE interaction in Cerrado environments should be investigated for the recommendation of cotton genotypes
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