, Volume 83, Issue 3, pp 185–191 | Cite as

Phenotypic variation in boron-toxicity tolerance at seedling stage in durum wheat (Triticum durum)

  • S. K. Yau
  • M. M. Nachit
  • J. Ryan
  • J. Hamblin


Nineteen durum wheat landraces, cultivars or advanced lines of different origins in West Asia and North Africa (WANA), and three barley and two bread wheat varieties were evaluated for their boron (B) toxicity tolerance. Seedlings were grown at five levels of soluble soil B in a plastic house under controlled temperatures. Significant differences existed between the durum wheat entries in days-to-symptom appearance and foliar symptom score. Under the highest soil B treatment, large differences existed between entries for dry weight per plant (P<0.05) but differences were non-significant for shoot B concentrations. Days-to-symptom appearance was highly correlated with symptom score, which was not correlated with shoot B concentrations. Boron toxicity symptom scores of the durum wheat entries ranged from the sensitive barley check to the moderately sensitive bread wheat check. As expected, days-to-symptom appearance decreased and symptom severity increased as the soil B concentrations increased.

The result of this study supported the preliminary finding that small, though statistically significant, variation in B toxicity symptom scores exist in durum wheat. The higher CV of symptom scores found here was mainly due to one sensitive entry, Cakmak. If Cakmak was excluded from the analysis, the CV would be reduced by half, to 10%. Durum wheat genotypes which are more tolerant to B toxicity should be sought. Based on the results of this study, and of soil surveys and information collected in WANA, germplasm collected from Algeria, Iraq, Libya, Syria, and the Anatolian Plateau of Turkey should be screened first.

Key words

boron toxicity durum wheat landraces Triticum durum 





West Asia and North Africa


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  1. Bingham, F.T., 1982. Boron. In: A.L. Page (Ed.) Methods of Soil Analysis, Part 2, 2nd Edition, pp. 431–447. Am. Soc. of Agronomy & Soil Sci. Soc. of Am., Madison.Google Scholar
  2. Cartwright, B., B.A. Zarcinas & A.H. Mayfield, 1984. Toxic concentrations of boron in a red-brown earth at Gladstone, South Australia. Aust. J. Soil Res. 22: 321–332.Google Scholar
  3. Cartwright, B., B.A. Zarcinas & L.R. Spoucer, 1986. Boron toxicity in South Australian barley crops. Aust. J. of Agric. Res. 37: 351–359.Google Scholar
  4. CIMMYT, 1986. Durum Wheat: Names, Parentage, Pedigrees and Origins. Compiled by P. Brajcich, N. Pfeiffer & E. Autrique. CIMMYT, Mexico.Google Scholar
  5. Gupta, U.C., 1979. Boron nutrition of crops. Adv. Agron. 31: 273–307.Google Scholar
  6. Jenkin, M.J. & R.C.M. Lance, 1991. Genetic studies on boron tolerance in berley. In: L. Munck (Ed.) Barley Genetics VI, pp. 556–557 Helsingborg, Sweden.Google Scholar
  7. Moody, D.B., A.J. Rathjen, B. Cartwright, J.G. Paull & J. Lewis, 1988. Genetic diversity and geographical distribution of tolerance to high levels of soil boron. In: T.E. Miller & R.M.D. Koebner (Eds). Proc. of 7th International Wheat Genetics Symposium. vol. 2, pp. 859–865, Inst. Plant Sci. Res., Cambridge, U.K.Google Scholar
  8. Moody, D.B., A.J. Rathjen & B. Cartwright, 1993. Yield evaluation of a gene for boron tolerance using backcross-derived lines. In: P.J. Randall, E. Delhaize, R.A. Richards & R. Munns (Eds), Genetic Aspects of Plant Mineral Nutrition, pp. 363–366. Kluwer Academic Publishers, the Netherlands.Google Scholar
  9. Nable, R.O., 1988. Resistance to boron toxicity amongst several barley and wheat cultivars: A preliminary examination of the resistance mechanism. Plant and Soil 112: 45–52.Google Scholar
  10. Nachit, M.M., 1992. Durum wheat breeding for Mediterranean drylands of North Africa and West Asia. In: S. Rajaram, E.E. Saan & G.P. Hettel (Eds), Durum wheats: Challenges and Opportunities. Wheat Special Report No. 9. CIMMYT, Mexico, D.F.Google Scholar
  11. Paull, J.G., B. Cartwright & A.J. Rathjen, 1988. Response of wheat and barley genotypes to toxic concentrations of soil boron. Euphytica 39: 137–144.Google Scholar
  12. Paull, J.G., A.J. Rathjen & B. Cartwright, 1991. Major gene control of tolerance of bread wheat (Triticum aestivum L.) to high concentrations of soil boron. Euphytica 55: 217–228.Google Scholar
  13. Sillanpaa, M., 1982. Micronutrients and the Nutrient Status of Soils: a Global Study. FAO, Rome.Google Scholar
  14. Srivastava, J.P., 1984. Durum wheat — its world status and potential in the Middle East and North Africa. Rachis 3 (1): 1–8.Google Scholar
  15. Wayne, R., 1992. Boron problems in the southern wheat belt. Rural Res. 153: 4–8.Google Scholar
  16. Yau, S.K., J. Hamblin & J. Ryan, 1994. Phenotypic variation in boron toxicity tolerance in barley, durum and bread wheat. Rachis (in press).Google Scholar

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • S. K. Yau
    • 1
  • M. M. Nachit
    • 1
  • J. Ryan
    • 1
  • J. Hamblin
    • 1
  1. 1.International Center for Agricultural Research in the Dry Areas (ICARDA)AleppoSyria

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