Abstract
The GxE interaction is one of the major difficulties of plant breeding programs, both in the selection phase and in the recommendation of cultivars. To assess adaptability and stability, various statistical methods are used. The simultaneous use of some methodologies, using multi-information criteria for cultivar’s recommendation, can extract information that cannot be observed using each methodology separately. The aim of this work was to perform a large description of the behavior of flooded-irrigated rice genotypes, responding to environmental variations, using methods already established in the literature, but exploring the particularities of each methodology that together establish an information criterion for cultivar recommendation. To this end, 18 rice genotypes belonging to flood-irrigated rice breeding program were evaluated over four agricultural years, 2012/2013 to 2015/2016, totaling 12 environments (3 sites × 4 years). Multi-information estimates were performed to adaptability and stability analysis. There was no sign for the effect of the genotypes, and there was the significance of the effects of environment and GxE interaction. The aggregation of information and the large description of the behavior of the flooded rice genotypes demonstrated to be an efficient tool for studies of adaptability and stability.
Highlights
Multi-information analysis for...The phenotypic expression is a result of the action of the genotype under the influence of the environment
In view of the above, the aim of this work was performed a large description of the behavior of flooded-irrigated rice genotypes, in terms of responding to environmental variations, using methods already established in the literature, but exploring the particularities of each methodology that together establish an information criterion for cultivar recommendation
Eighteen rice genotypes belonging to the flood-irrigated rice breeding program of the Southeast region of the state of Minas Gerais were evaluated, and five of these genotypes were used as experimental controls (Rubelita, Seleta, Ourominas, Predileta, and Rio Grande)
Summary
Multi-information analysis for...The phenotypic expression is a result of the action of the genotype under the influence of the environment. If there is GxE interaction, the same genotype may express different behavior between environments due to the differential expression of its genes according to environmental influences (Cruz, Regazzi, Carneiro, & 2012). Detailed studies on genotype behavior in the evaluated environments are essential for the recommendation of cultivars adapted to a specific region. Such studies are based on genotype behavior, describing its adaptability and stability (Chaves, 2001; Maia et al, 2013). Adaptability can be defined as the ability of genotypes to respond to environmental stimuli, and stability can be defined as the ability of genotypes to exhibit highly predictable behavior (Cruz, Regazzi, & Carneiro, 2014; Silva Júnior et al, 2020a)
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