Strategies for Multi-trait Selection of Sweet Sorghum Progenies

The selection of sweet sorghum genotypes is based on multiple agronomical and technological traits. The objectives of this study were to evaluate the effectiveness of inter-trait recovery information in improving the selective accuracy of the predicted genetic values of sweet sorghum progenies, and...

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Published inCrop breeding and applied biotechnology Vol. 21; no. 4
Main Authors Botelho, Thiago Tavares, Leite, Pakizza Sherma da Silva, Parrella, Rafael Augusto da Costa, Nunes, José Airton Rodrigues
Format Journal Article
LanguageEnglish
Portuguese
Published Vicosa Crop Breeding and Applied Biotechnology 2021
Subjects
AGRONOMY
BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Flowering
Genetic diversity
Genetic variance
Genotypes
Mass production
Sorghum
selection index
Sorghum bicolor
BLUP
genetic correlation
REML
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Summary:The selection of sweet sorghum genotypes is based on multiple agronomical and technological traits. The objectives of this study were to evaluate the effectiveness of inter-trait recovery information in improving the selective accuracy of the predicted genetic values of sweet sorghum progenies, and to compare several selection indices in terms of selection gains using single- and multi-trait mixed models. The trials were conducted in two sites. The traits flowering time, plant height, green mass production, total soluble solids content, and tons of Brix per hectare were assessed. Significant genetic variance was observed for all traits, except for total soluble solids content. The multi-trait analysis provided more accurate estimates of genetic parameters and predictions of the progeny genetic values, and higher selection gain than the singletrait analysis. The direct selection for TBH and the FAI/BLUP index resulted in balanced genetic gains for the assessed traits.
ISSN:1518-7853
1984-7033
1984-7033
DOI:10.1590/1984-70332021v21n4a59