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Microspore embryogenesis of high sn-2 erucic acid Brassica oleracea germplasm

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Abstract

Brassica oleracea accessions possess traits that would be useful in commercial Brassica crops. These traits can be studied more effectively through the production of doubled haploid plants. Nineteen B. oleracea accessions from several subspecies possessing significant sn-2 erucic acid were screened for suitability for microspore culture using techniques well established for Brassica. Fifteen of the 19 accessions produced embryos. Genotypic differences were observed with embryogenesis ranging from 0 to 3000 embryos/100 buds. Embryogenesis was improved for two of four accessions by initiating cultures in NLN medium with 17% sucrose, then reducing sucrose to 10% after 48 h. An increase in embryogenesis for the same two accessions was observed when microspores were cultured at a density of 100 000/ml rather than 50 000 microspores/ml. A culture temperature of 32 °C for 48 h was beneficial for three of the four accessions when compared to a longer incubation period (72 h) or a higher temperature (35 °C). One accession line, Bo-1, was found to produce microspore-derived embryos which contained triacylglycerols with significant proportions of erucic acid at the sn-2 position.

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Authors and Affiliations

  1. Plant Biotechnology Institute, National Research Council of Canada, 110 Gymnasium Place, Saskatoon, SK, S7N 0W9, CANADA

    A.M.R. Ferrie, D.C. Taylor, S.L. MacKenzie & W.A. Keller

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  1. A.M.R. Ferrie
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  2. D.C. Taylor
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  3. S.L. MacKenzie
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  4. W.A. Keller
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Ferrie, A., Taylor, D., MacKenzie, S. et al. Microspore embryogenesis of high sn-2 erucic acid Brassica oleracea germplasm. Plant Cell, Tissue and Organ Culture 57, 79–84 (1999). https://doi.org/10.1023/A:1006325431653

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  • DOI: https://doi.org/10.1023/A:1006325431653

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