Euphytica

, Volume 33, Issue 2, pp 295–303 | Cite as

Interspecific transfer of Brassica juncea-type high blackleg resistance to Brassica napus

  • N. N. Roy
Article

Summary

Complete resistance to Leptosphaeria maculans, the cause of blackleg of oilseed rape (Brassica napus), was transferred from B. juncea to B. napus through an interspecific cross. B. juncea-type complete resistance (JR) was recognized first in one F3 progeny (OnapJR) by the absence of leaf-lesions on seedlings and canker-free adult plants. The commercially important characters of B. napus were retained in advanced lines of OnapJR, which combined JR with low erucic acid levels (<0.5%), high seed yield and variable maturity dates.

JR appeared to be inherited as a major gene or genes. Segregation for resistance and susceptibility contintied to occur during later generations of selection of OnapJR. JR was readily transferred from OnapJR to other suitable B. napus cultivars or lines with partial resistance to blackleg and resulted in highly vigorous carly generation selections adapted to cold, wet situations along with complete resistance to blackleg.

Index words

Brassica napus rapeseed Brassica juncea Leptosphaeria maculans blackleg resistance interspecific cross gene transfer polygenic resistance seedling and adult resistance 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Cargeeg L. A. & N. Thurling, 1979. Seedling and adult plant resistance to blackleg (Leptosphaeria maculans (Desm.) Ces et de Not.) in spring rape (Brassica napus L.) Aust. J. Agric. Res. 30: 37–46.Google Scholar
  2. Hayes J. D., 1973. Prospects for controlling cereal disease by breeding for increased levels of resistance. Ann. Appl. Biol. 75: 140–144.Google Scholar
  3. McGee D. C. & G. A. Petrie, 1979. Seasonal patterns of ascospore discharge by Leptosphaeria maculans in relation to black leg of oilseed rape. Phytopathology 69: 586–589.Google Scholar
  4. Nelson R. R., 1978. Genetics of horizontal resistance to plant diseases. Ann. Rev. Phytopathol. 16: 359–360.CrossRefGoogle Scholar
  5. Rajan S. W. & M. W. Hardas, 1964. Autosyndetic and allosyndetic pairing in Brassicae. Ind. J. Genet. and Pl. Breeding 24: 15–21.Google Scholar
  6. Roy N. N. & J. Reeves, 1975. Breeding better rape and linseed for Western Australia. J. Agric. Western Australia. 16: 95–97.Google Scholar
  7. Roy N. N., 1978a. A study on disease variation in the population of an interspecific cross of Brassica juncea L. x B. napus, L. Euphytica 27: 145–149.Google Scholar
  8. Roy N. N., 1978b. Wesreo—a blackleg resistant rapeseed. J. Agric. Western Australia. 19: 42.Google Scholar
  9. Roy N. N., 1980. Species crossability and early generation plant fertility in interspecific crosses of Brassica. SABRAO J. 12: 43–54.Google Scholar
  10. Roy, N. N. & M. L. Poole, 1981. Wesroona and Wesbell-high rainfall rapeseed varieties. Western Australian Department of Agriculture-Farmnote No. 109/81.Google Scholar
  11. Roy, N. N., 1983. Transfer of Brassica juncea type complete resistance to blackleg into Brassica napus. Proc. Australian Plant Breeding Conf. Adelaide, p. 239–240.Google Scholar
  12. Russel, G. E., 1978. Plant breeding for pest and disease resistance. Butterworth and Co. Ltd.Google Scholar
  13. Van der Plank J. E., 1971. Proc. Seminar on Horizontal resistance to the blast disease of rice CIAT, Cali-Columbia. 21–26.Google Scholar

Copyright information

© Veenman B.V., Wageningen 1984

Authors and Affiliations

  • N. N. Roy
    • 1
  1. 1.Department of AgricutureSouth PerthAustralia

Personalised recommendations