Genetic parameters and selection for multiple traits in sorghum for forage purposes.

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Author(s): FIGUEIREDO JÚNIOR, J. M. M. de; PARRELLA, R. A. da C.; NUNES, J. A. R.

Summary: We aimed to estimate genetic parameters and select sorghum lines for forage purposes based on agronomic and chemical traits. A total of 100 inbred lines, comprising the biomass/bmr, biomass, dual purpose (sweet/forage), and forage types, were evaluated in the 2020/2021 and 2021/2022 crop years. We analyzed the data using a linear mixed model approach. Genetic variance, line mean-based heritability, selection accuracy, genetic correlation between traits and crops and the coefficient of experimental variation were estimated. The breeding values of the lines were predicted, and the factor analysis and genotype-ideotype distance index based on BLUP (FAI-BLUP) were applied for multi-trait selection. Biomass production and cell wall composition traits were measured. There was genetic variation among the lines, with moderate to high heritability. The lines selected by the FAI-BLUP index resulted in significant genetic gains expected with selection for all traits.

Publication year: 2024

Types of publication: Journal article

Unit: Embrapa Maize & Sorghum

Keywords: Brown midrib, Componentes de variância, Correlated responses, Ganho de seleção, Nervura central marrom, Resposta correlacionada, Selection gain, Sorghum Bicolor, Sorgo, Variance components

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