A mixed model to multiple harvest-location trials applied to genomic prediction in Coffea canephora

Autor(es)

Ventorim Ferrao, Luis Felipe ; Ferrao, Romario Gava ; Gava Ferrao, Maria Amelia ; Francisco, Aymbire ; Franco Garcia, Antonio Augusto

• Tipo de documento: Artigo Científico
• Fonte: Tree Genetics & Genomes; v. 13, n. 5 OCT 2017.
• Citações Web of Science: 9

Resumo

Genomic selection (GS) has been studied in several crops to increase the rates of genetic gain and reduce the length of breeding cycles. Despite its relevance, there are only a modest number of reports applied to the genus Coffea. Effective implementation depends on the ability to consider genomic models, which correctly represent breeding scenario in which the species are inserted. Coffee experimentation, in general, is represented by evaluations in multiple locations and harvests to understand the interaction and predict the performance of untested genotypes. Therefore, the main objective of this study was to investigate GS models suitable for use in Coffea canephora. An expansion of traditional GBLUP was considered and genomic analysis was performed using a genotyping-bysequencing (GBS) approach, showed good potential to be used in coffee breeding programs. Interactions were modeled using the multiplicative mixed model theory, which is commonly used in multi-environment trials (MET) analysis in perennial crops. The effectiveness of the method used was compared with other genetic models in terms of goodnessof- fit statistics and prediction accuracy. Different scenarios that mimic coffee breeding were used in the cross-validation process. The method used had the lowest AIC and BIC values and, consequently, the best fit. In terms of predictive ability, the incorporation of the MET modeling showed higher accuracy (on average 10-17% higher) and lower prediction errors than traditional GBLUP. The results may be used as basis for additional studies into the genus Coffea and can be expanded for similar perennial crops. (AU)

• Processo FAPESP: 14/20389-2 - Desenvolvimento de modelos genético-estatísticos para seleção genômica em Coffea canephora e outras espécies vegetais
• Beneficiário: Luís Felipe Ventorim Ferrão
• Modalidade de apoio: Bolsas no Brasil - Doutorado