Resumo

ANGELES ESPINO, Alejandro et al. Evaluation of hybrid vigor in sunflower (Helianthus annuus L.) crosses from s₁ early lines with low oil content. Acta univ [online]. 2021, vol.31, e2905.  Epub 16-Fev-2022. ISSN 2007-9621.  https://doi.org/10.15174/au.2021.2905.

Sunflower is the fourth largest oilseed in the world due to its production. One objective for its genetic improvement is to identify and select higher lines to form early, high-performance, oil-containing hybrids. In this study, in order to test whether it is possible to achieve high-content progenies through early lines S1 with low oil content, S1 lines of the variety TECMON-2 were obtained, the low oil content lines were selected, and hybrids which were evaluated with two witnesses (DO-704 and TECMON-2) in random blocks with three repetitions were obtained. The heterosis recorded for up to 65% for this character in experimental hybrids resulted in hybrids with different levels of yield and oil content (similar and superior to the commercial witness), such as H-1 hybrid, which allowed to estimate a final oil production superior to all genotypes used in the study.

Palavras-chave : Heterosis; simple hybrids; inbred depression; conventional genetic improvement.

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