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Euphytica

, Volume 164, Issue 2, pp 593–601 | Cite as

Interspecific cross of Brassica oleracea var. alboglabra and B. napus: effects of growth condition and silique age on the efficiency of hybrid production, and inheritance of erucic acid in the self-pollinated backcross generation

  • Rick A. Bennett
  • Mohan R. Thiagarajah
  • Jane R. King
  • M. Habibur RahmanEmail author
Article

Abstract

Interspecific hybrids were produced from reciprocal crosses between Brassica napus (2n = 38, AACC) and B. oleracea var. alboglabra (2n = 18, CC) to introgress the zero-erucic acid alleles from B. napus into B. oleracea. The ovule culture embryo rescue technique was applied for production of F1 plants. The effects of silique age, as measured by days after pollination (DAP), and growth condition (temperature) on the efficiency of this technique was investigated. The greatest numbers of hybrids per pollination were produced under 20°/15°C (day/night) at 16 DAP for B. oleracea (♀) × B. napus crosses, while under 15°/10°C at 14 DAP for B. napus (♀) × B. oleracea crosses. Application of the ovule culture technique also increased the efficiency of BC1 (F1 × B. oleracea) hybrid production by 10-fold over in vivo seed set. The segregation of erucic acid alleles in the self-pollinated backcross generation, i.e. in BC1S1 seeds, revealed that the gametes of the F1 and BC1 plants carrying a greater number of A-genome chromosomes were more viable. This resulted in a significantly greater number of intermediate and a smaller number of high-erucic acid BC1S1 seeds.

Keywords

Brassica napus Brassica oleracea var. alboglabra Ovule culture Erucic acid inheritance 

Notes

Acknowledgements

Funding for this project by Natural Sciences and Engineering Research Council of Canada (NSERC) and Alberta Canola Producers Commission (ACPC) to the last author is gratefully acknowledged. The authors are also thankful for the technical assistance of An Vo of the Canola Program.

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Rick A. Bennett
    • 1
  • Mohan R. Thiagarajah
    • 1
  • Jane R. King
    • 1
  • M. Habibur Rahman
    • 1
    Email author
  1. 1.Department of Agricultural, Food and Nutritional ScienceUniversity of AlbertaEdmontonCanada

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