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Crop Breeding and Applied Biotechnology

versão impressa ISSN 1518-7853versão On-line ISSN 1984-7033

Resumo

CARDOSO, Poliane Marcele Ribeiro et al. Genetic evaluation and selection in Jatropha curcas L. Crop Breed. Appl. Biotechnol. [online]. 2018, vol.18, n.2, pp.192-199. ISSN 1518-7853.  http://dx.doi.org/10.1590/1984-70332018v18n2a27.

J. curcas (physic nut) is one of the most promising oilseeds for biofuel production and the knowledge about genetic parameter estimates is important for its breeding. Here, we evaluated 121 families, from 48 to 60 months of age, aiming genetic evaluation and selection. The trial was set up in an 11 x 11 lattice design, with three replications and 4-plant plot. The traits evaluated were fruit yield (FY), grain (GY) and oil yield (OY), fruit husk percentage (FH) and seed oil content (OC). Individual heritabilities were low (0.19 to 0.23), requiring accurate selection and improvement methods. Moderate repeatabilities were observed for FY (0.54), GY (0.52), OC (0.30) and OY (0.51), indicating that the families evaluated maintained relative superiority over the years. With selection of the 20 best individuals, the predicted genotypic gains (66%) were greater than the additive gains (56%), indicating greater possibilities of success from cultivation of clones.

Palavras-chave : Physic nut; biodiesel; biokerosene; genetic parameters; grain yield and components; variability..

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