Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/53338
Título: Exploitation of heterosis in tobacco breeding in Brazil
Palavras-chave: Plant breeding
Quantitative genetics
Diallel crosses
Hybrid vigor
Data do documento: 2022
Editor: Universidade Federal de Viçosa
Citação: CARVALHO, B. L. et al. Exploitation of heterosis in tobacco breeding in Brazil. Crop Breeding and Applied Biotechnology, [S.l.], v. 22, n. 2, 2022.
Resumo: 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.
URI: http://repositorio.ufla.br/jspui/handle/1/53338
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