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Weverton Gomes da Costa, Aluizio Borém de Oliveira, Cosme Damião Cruz, Renato Domiciano Silva Rosado and Plínio César Soares

ARTICLE – Dynamics, diversity and experimental precision in final irrigated rice testing: a time meta-analysis

Abstract: The objective of this study was to investigate diversity, experimental
conditions and dynamics of the Irrigated Rice Breeding Program of Minas Gerais – Brazil, by meta-analysis. The target traits were grain yield, plant height
and days to flowering. Evaluations were based on estimates of 376 genotypes
grown at three locations, in two final comparative trials, in 14 growing seasons.
Stability of the overall averages of the traits plant height and days to flowering
was observed, indicating an adequate plant height and medium cycle. High
average yields (>5,000 kg ha-1), good experimental accuracy and genetic variability were recorded. However, the genetic variability of all traits decreased
over time, indicating the need to increase genotypic diversity. The parameter
estimates of the morphoagronomic traits studied in time meta-analysis indicated
the dynamic nature and good accuracy of the Irrigated Rice Breeding Program
of Minas Gerais.

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