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EnglishThe use of mixed models for evaluating diallel crosses is a highly timely option to the reliable prediction of progeny genetic values. In the sweet pepper crop, hybrids are commercially explored on a large scale, mainly because of their characteristics of economic importance. This study aimed to assess the potential of hybrids obtained from a partial diallel among five sweet pepper lines developed for the hydroponic cultivation system and two simple hybrids, by applying mixed models. It was performed crosses in the partial diallel scheme among the (L1B, L6, L7, L18, and L19) lines and the simple hybrids ‘Valdor’ and ‘Atlantis’. Plants were cultivated in hydroponic system with substrate and irrigated three times a day using nutrient solution. On the basis of mixed models, the following traits were assessed: mean fruit diameter (FD), mean fruit length (FL), mean fruit number per plant (FNP), mean fruit mass (FM), early yield (EYIELD), and mean fruit mass per plant (FMP). The L6 line was the one that showed the highest estimate of general combination capacity for FMP, FM, and EYIELD, proving to be promising for recommendation. The hybrid that provided the best specific combining ability for FD, FM, FMP, and EYIELD was L6 x ‘Valdor’. Triple hybrids were efficient to maximize yield for the traits of interest by the use of the mixed model. portuguesA utilizacao de modelos mistos na avaliacao de cruzamentos dialelicos e uma opcao altamente oportuna para a fidedigna predicao dos valores geneticos das progenies. Na cultura do pimentao, os hibridos sao largamente explorados comercialmente, principalmente por suas caracteristicas de importância economica. O objetivo deste trabalho foi avaliar o potencial de hibridos resultantes de um dialelo parcial entre cinco linhagens de pimentao desenvolvidas para o sistema de cultivo hidroponico e dois hibridos simples, utilizando modelos mistos. Foram realizados cruzamentos no esquema de dialelo parcial entre as linhagens (L1B, L6, L7, L18 e L19) e os hibridos simples ‘Valdor’ e ‘Atlantis’. As plantas foram cultivadas em sistema hidroponico com substrato e irrigadas tres vezes ao dia com solucao nutritiva. Com base em modelos mistos, foram avaliadas as caracteristicas: diâmetro medio de frutos (DF); comprimento medio de frutos (CF); numero medio de frutos por planta (NFP); massa media de frutos (MMF); producao precoce (PP) e massa media de frutos por planta (MFP). A linhagem L6 foi a que expressou maior estimativa de capacidade geral de combinacao para MFP, MMF e PP, revelando-se promissora para recomendacao. O hibrido triplo que apresentou melhor capacidade especifica de combinacao para DF, MMF, MFP e PP, foi L6 x ‘Valdor’. Os hibridos triplos foram eficientes para incrementar a produtividade para as caracteristicas de interesse com a aplicacao da modelagem mista.

Estimation of genetic merit of diallel hybrids of sweet pepper by mixed models