Modeling covariance structures for genetic and non‐genetic effects in cowpea multi‐environment trials

Vista sencilla de ítem
dc.creatorAraújo, Maurício dos Santos
dc.creatorChaves, Saulo Fabrício da Silva
dc.creatorDamasceno‐Silva, Kaesel Jackson
dc.creatorDias, Luiz Antônio dos Santos
dc.creatorde Rocha, Maurisrael de Moura
dc.date2023-05
dc.date2025-07-22T16:57:39Z
dc.date2025-07-22T16:57:39Z
dc.date.accessioned2026-06-27T15:07:21Z
dc.descriptionIn cowpea breeding, multi‐environment trials are conducted to select lines with high yield. The occurrence of genetic and/or statistical imbalance is common in these experiments, in addition to the possibility of (co)variance between genetic and non‐genetic effects. We explore the restricted maximum likelihood/best linear unbiased prediction features to select the model with the most appropriated covariance structure and compare the results with the traditional model (homogenous variances and no covariances). Then, 17 inbred lines and three cultivars were evaluated in six experiments during two crop years in the semiarid zone of Northeast Brazil. The trait evaluated was the 100‐grain weight. We selected the best model considering the Akaike Information Criterion. The model with diagonal structure for the residual effects and heterogeneous compound symmetry for the genetic effects had the best fit. The predicted genetic gain of lines selected in this model was 1.18% higher compared to the traditional model. Modeling different (co)variance structures for genetic and non‐genetic effects is an efficient approach in selecting superior genotypes in multi‐environment trials in cowpea breeding.
dc.identifierhttps://hdl.handle.net/10568/175723
dc.identifier.urihttp://hdl.handle.net/123456789/95192
dc.languageen
dc.publisherWiley
dc.rightsLimited Access
dc.sourceAraújo, Maurício dos Santos; Chaves, Saulo Fabrício da Silva; Damasceno‐Silva, Kaesel Jackson; Dias, Luiz Antônio dos Santos; and de Rocha, Maurisrael de Moura. 2023. Modeling covariance structures for genetic and non-genetic effects in cowpea multi-environment trials. Agronomy Journal 115(3): 1248-1256. https://doi.org/10.1002/agj2.21321
dc.subjectcowpeas
dc.subjectbiofortification
dc.subjectyield factors
dc.titleModeling covariance structures for genetic and non‐genetic effects in cowpea multi‐environment trials
dc.typeJournal Article

Archivos

Colecciones

Instituto Internacional de Investigación sobre Políticas Alimentarias (IFPRI)