2018
DOI: 10.1590/s0100-204x2018000500008 View full text |Buy / Rent full text
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Abstract: The objective of this work was to evaluate the potential per se of male-sterile and fertility-restorer lines of sweet sorghum (Sorghum bicolor), as well as to detail the heterosis manifested for some traits directly or indirectly related to ethanol production, accumulation rate, and predictability. Evaluations were performed for 20 genotypes, of which 4 are fertility-restorer lines (R), 3 are male-sterile lines (A), and 12 are experimental hybrids (H) resulting from the partial diallel cross between lines A an… Show more

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“…In the current study heterosis in productivity of green mass was caused by a simultaneous increase of plant height, stem diameter and plant foliage. This has been confirmed by the study of G. M. R. Lombardi et al [18].…”
Section: Resultssupporting
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“…In the current study heterosis in productivity of green mass was caused by a simultaneous increase of plant height, stem diameter and plant foliage. This has been confirmed by the study of G. M. R. Lombardi et al [18].…”
Section: Resultssupporting
“…Thus, the heterosis observed in the analysis considering the parents and the hybrids in the present study is due to the epistatic effects and not to the effects of dominance, as expected. Lombardi et al (2018), Rocha (2016), and Durães (2014) in diallel studies on sorghum using the Griffing (1956) model, analyzing parents and F 1 s, also observed high phenotypic variance due to the effects of SCA for plant height and production of fresh biomass and verified the presence of nonadditive gene effects in the determination of these variables but treated them as due to the effects of dominance. Jiang et al (2017,) in more detailed studies of genetics in wheat, showed the importance of epistasis, mainly additive ´ additive in the heterosis calculation, in which it represented 50% of the genetic variation of heterosis, whereas the effects of dominance represented only 16% of the total variation.…”
Section: Resultsmentioning