Exploitation of heterosis in tobacco breeding in Brazil

This study estimated the general and specific combining abilities and mean heterosis of tobacco lines of the varietal groups Flue-Cured Virginia (FCV) and Air-Cured Burley (BY). In addition, possible advantages and an improved strategy of using hybrids in tobacco breeding in the tropics were discuss...

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Bibliographic Details
Published in:Crop breeding and applied biotechnology 2022, Vol.22 (2)
Main Authors: Carvalho, Bruna Line, Bruzi, Adriano Teodoro, Lewis, Ramsey, Pádua, José Maria Villela, Ramalho, Magno Antonio Patto
Format: Article
Language:English
Subjects:
AGRONOMY
BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Breeding
Heterosis
Hybrids
Tobacco
Tropical environments
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Summary:This study estimated the general and specific combining abilities and mean heterosis of tobacco lines of the varietal groups Flue-Cured Virginia (FCV) and Air-Cured Burley (BY). In addition, possible advantages and an improved strategy of using hybrids in tobacco breeding in the tropics were discussed. Ten BY and 13 FCV lines were crossed in a diallel mating design. The hybrids and parental lines were evaluated at two locations in Southern Brazil. The mean heterosis was 5.37% for FCV and zero for BY lines, although higher than 15% in some combinations. The occurrence of heterosis indicates dominance in the control of tobacco yield. Tobacco breeding programs must focus primarily on improving the performance of lines per se and then on the identification of the best hybrid by testing combinations.
ISSN:1518-7853
1984-7033
1984-7033
DOI:10.1590/1984-70332022v22n2a13