Missing Plants Effects and Stand Correction Methods in <i>Coffea arabica</i> Progeny Experiments

Plant loss occasionally occurs in field experiments with coffee crops in experimental plots. In breeding programs, such loss can be harmful, especially when the corresponding statistical analyses are not consistent with the experimentally generated data. Herein, we analyzed productivity data to dete...

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Bibliographic Details
Main Authors: César Elias Botelho, Vinicius Teixeira Andrade, Juliana Costa de Rezende Abrahão, Flávia Maria Avelar Gonçalves
Format: Article
Language:English
Published: MDPI AG 2023-09-01
Series:Agronomy
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Online Access:https://www.mdpi.com/2073-4395/13/9/2374
Description
Summary:Plant loss occasionally occurs in field experiments with coffee crops in experimental plots. In breeding programs, such loss can be harmful, especially when the corresponding statistical analyses are not consistent with the experimentally generated data. Herein, we analyzed productivity data to determine whether the compensatory effect occurs in coffee crops, evaluated the need to correct experimental failures, and identified the best stand correction method. We used productivity data from six harvests of eleven experiments with <i>Coffea arabica</i> plants. The experiments were implemented in a randomized block design, with four replications and six plants per plot. The following stand correction methods were evaluated: rule of three; Zuber; Vencovsky and Cruz covariance of the average or ideal stands; and Cruz, and the data were compared without correction adjustments. The most adequate correction methods were selected based on genetic variance, selective accuracy, and progeny ordering. The compensatory effect was evident from the analyzed data, with stand correction being evidenced as beneficial in progeny competition experiments. The best results were obtained for the covariance methods using average or ideal stands, followed by the method proposed by Cruz. The rule of three and Zuber method exhibited unsatisfactory results and are not recommended for stand correction in progeny competition experiments with coffee crops.
ISSN:2073-4395