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The Scientific World Journal
Volume 2016, Article ID 7392603, 7 pages
http://dx.doi.org/10.1155/2016/7392603
Research Article

Genetic Analysis of Reduced γ-Tocopherol Content in Ethiopian Mustard Seeds

Institute for Sustainable Agriculture (IAS-CSIC), Alameda del Obispo s/n, 14004 Córdoba, Spain

Received 15 January 2016; Accepted 14 April 2016

Academic Editor: Fumio Takaiwa

Copyright © 2016 Elena García-Navarro et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Ethiopian mustard (Brassica carinata A. Braun) line BCT-6, with reduced γ-tocopherol content in the seeds, has been previously developed. The objective of this research was to conduct a genetic analysis of seed tocopherols in this line. BCT-6 was crossed with the conventional line C-101 and the , , and BC plant generations were analyzed. Generation mean analysis using individual scaling tests indicated that reduced γ-tocopherol content fitted an additive-dominant genetic model with predominance of additive effects and absence of epistatic interactions. This was confirmed through a joint scaling test and additional testing of the goodness of fit of the model. Conversely, epistatic interactions were identified for total tocopherol content. Estimation of the minimum number of genes suggested that both γ- and total tocopherol content may be controlled by two genes. A positive correlation between total tocopherol content and the proportion of γ-tocopherol was identified in the generation. Additional research on the feasibility of developing germplasm with high tocopherol content and reduced concentration of γ-tocopherol is required.