Genotypic performance, adaptability and stability in special types of irrigated rice using mixed models

Eduardo Anibele Streck, Ariano Martins de Magalhães Júnior, Gabriel Almeida Aguiar, Paulo Henrique Karling Facchinello, Paulo Ricardo Reis Fagundes


There is an increasing demand for special types of rice that have black or red pericarp, low amylose (subspecie japonica) or aromatic. However, intense breeding process for obtaining and indicating genetically promising new cultivars and adapted to cultivation environments are demanded. In this sense, for evaluating the special types of irrigated rice genotypes, and determining the adaptability and stability of these using mixed models. First, a preliminary agronomic evaluation of genotypes for special types of irrigated rice was performed, and later, the agronomically promising genotypes were evaluated in multi-site trials, aiming at verifying the interactions with the environment. Statistical analyzes were performed considering mixed models, using the SELEGEN-REML/BLUP software. High genotypic variability among genotypes for special types of irrigated rice was observed, obtaining some agronomically promising and with good adaptability and stability, with high accuracy and selection efficiency using mixed models. The observed wide diversity and rice genetic variability presented new prospects and opportunities for producers for acquiring food of higher added value to consumer market.


Oryza sativa; Black rice; Red rice; Aromatic rice; Japanese rice

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