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Characterization of a Collection of Brassica carinata Genotypes for in vitro Culture Response and Mode of Shoot Regeneration

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DOI: 10.4236/ajps.2011.21003    6,401 Downloads   11,726 Views   Citations

ABSTRACT

Brassica carinata, a natural alloploid formed between B. oleracea and B. nigra, is a potential oil crop for the Mediterranean area in which genetic transformation could help to breeding. In vitro culture and shoot regeneration are key factors in developing an efficient transformation method in the genus Brassica. However, the studies for in vitro culture and shoot regeneration in B. carinata are limited to only a few genotypes. The aim of this study was to evaluate the in vitro culture response and shoot regeneration in a collection of B. carinata accessions to identify promising genotypes with high shoot regeneration for genetic transformation experiments. Cotyledonary explants from 51 genotypes were cultured in vitro and callus formation and swelling as well as the mode of shoot regeneration evaluated. A highly positive response to in vitro culture, i.e. callus formation or swelling, was observed in all the genotypes tested. Tissue blackening occurred only in eleven genotypes. Parameters like callus formation and swelling, and number of shoots per explant were highly variable among genotypes. Fourteen genotypes regenerated only via callus formation, whereas only one regenerated only via swelling. Most genotypes showed a higher percentage of callus formation than swelling. The average number of shoots regenerating per explant among genotypes was the most variable factor measured. Six genotypes regenerated more than 6 shoots per explant via callus phase. These genotypes have been identified as having a high regeneration potential and can be used in genetic transformation via Agrobacterium.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

J. Gil-Humanes, A. Martín and F. Barro, "Characterization of a Collection of Brassica carinata Genotypes for in vitro Culture Response and Mode of Shoot Regeneration," American Journal of Plant Sciences, Vol. 2 No. 1, 2011, pp. 27-34. doi: 10.4236/ajps.2011.21003.

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