Theoretical and Applied Genetics

, Volume 82, Issue 6, pp 729–236 | Cite as

The presence of the enhanced K/Na discrimination trait in diploid Triticum species

  • J. Gorham
  • A. Bristol
  • E. M. Young
  • R. G. Wyn Jones
Original Articles


A number of accessions of the three species of diploid wheat, Triticum boeoticum, T. monococcum, and T. urartu, were grown in 50 mol m-3 NaCl+2.5 mol m-3 CaCl2. Sodium accumulation in the leaves was low and potassium concentrations remained high. This was not the case in T. durum grown under the same conditions, and indicates the presence in diploid wheats of the enhanced K/Na discrimination character which has previously been found in Aegilops squarrosa and hexaploid wheat. None of the accessions of diploid wheat showed poor K/Na discrimination, which suggests that if the A genome of modern tetraploid wheats was derived from a diploid Triticum species, then the enhanced K/Na discrimination character became altered after the formation of the original allopolyploid. Another possibility is that a diploid wheat that did not have the enhanced K/Na discrimination character was involved in the hybridization event which produced tetraploid wheat, and that this diploid is now extinct or has not yet been discovered.

Key words

Triticum K/Na discrimination Salt tolerance 


  1. Caldwell KA, Kasarda DD (1978) Assessment of genomic and species relationships in Triticum and Aegilops by PAGE and by differential staining of seed albumins and globulins. Theor Appl Genet 52:273–280Google Scholar
  2. Chao S, Sharp PJ, Worland AJ, Warham EJ, Koebner RMD, Gale MD (1989) RFLP-based genetic maps of wheat homoeologous group 7 chromosomes. Theor Appl Genet 78:495–504Google Scholar
  3. Dvorak J (1983) The origin of wheat chromosomes 4A and 4B and their genome reallocation. Can J Genet Cytol 25:210–214Google Scholar
  4. Dvorak J, McGuire PE, Cassidy B (1988) Apparent sources of the A genomes of wheats inferred from polymorphism in abundance and restriction fragment length of repeated nucleotide sequences. Genome 30:680–689Google Scholar
  5. Gill BS, Chen PD (1987) Role of cytoplasm-specific introgression in the evolution of the polyploid wheats. Proc Natl Acad Sci USA 84:6800–6804Google Scholar
  6. Gill RS, Dhaliwal HS, Multani DS (1988) Synthesis and evaluation of Triticum durumT. monococcum amphiploids. Theor Appl Genet 75:912–916Google Scholar
  7. Gorham J (1987) Analysis of inorganic anions and cations in plant tissues by ion chromatography. In: Williams PA, Hudson MJ (eds) Recent developments in ion exchange. Elsevier Applied Science, London and New York, pp 14–21Google Scholar
  8. Gorham J (1990a) Salt tolerance in the Triticeae: ion discrimination in rye and triticale. J Exp Bot 41:609–614Google Scholar
  9. Gorham J (1990b) Salt tolerance in the Triticeae: K/Na discrimination in Aegilops species. J Exp Bot 41:615–621Google Scholar
  10. Gorham J (1990c) Salt tolerance in the Triticeae: K/Na discrimination in synthetic hexaploid wheats. J Exp Bot 41:623–627Google Scholar
  11. Gorham J, McDonnell E, Wyn Jones RG (1984) Pinitol and other solutes in salt-stressed Sesbania aculeata. Z. Pflanzenphysiol 114:173–178Google Scholar
  12. Gorham J, Hardy C, Wyn Jones RG, Joppa LR, Law CN (1987) Chromosomal location of a K/Na discrimination character in the D genome of wheat. Theor Appl Genet 74:584–588Google Scholar
  13. Gorham J, Wyn Jones RG, Bristol A (1990a) Partial characterization of the trait for enhanced K/Na discrimination in the D genome of wheat. Planta 180:590–597Google Scholar
  14. Gorham J, Bristol A, Young EM, Wyn Jones RG, Kashour G (1990b) Salt tolerance in the Triticeae: K/Na discrimination in barley. J Exp Bot 41:1095–1101Google Scholar
  15. Jaaska V, Jaaska U (1980) Anaerobic induction of alcohol dehydrogenase isozymes in tetraploid wheats and their diploid relations. Biochem Physiol Pflanzen 175:570–577Google Scholar
  16. Johnson BL, Dhaliwal HS (1976) Reproductive isolation of Triticum boeoticum and Triticum urartu and the origin of tetraploid wheats. Am J Bot 63:1088–1094Google Scholar
  17. Joppa LR, Maan SS (1982) A durum wheat disomic-substitution line having a pair of chromosomes from Triticum boeoticum: effect on germination and growth. Can J Genet Cytol 24:549–557Google Scholar
  18. Joshi YC, Dwivedi RS, Qadar A, Bal AR (1982) Salt tolerance in diploid, tetraploid and hexaploid wheat. Indian J Plant Physiol 25:421–422Google Scholar
  19. Kerby K, Kuspira J (1987) The phylogeny of the polyploid wheats Triticum aestivum (bread wheat) and Triticum turgidum (macaroni wheat). Genome 29:722–737Google Scholar
  20. Miller TE (1987) Systematics and evolution. In: Lupton FGH (ed) Wheat breeding: its scientific basis. Chapman and Hall, London, pp 1–30Google Scholar
  21. Naranjo T, Roca A, Goicoechea PG, Giraldez R (1987) Arm homoeology of wheat and rye chromosomes. Genome 29:873–882Google Scholar
  22. Rana RS, Singh KN, Ahuja PS (1980) Chromosomal variation and plant tolerance to sodic and saline soils. In: Symposium papers. Proc Int Symp Salt-Affected Soil. Central Soil Salinity Research Institute, Karnal, India, pp 487–493Google Scholar
  23. Rayburn AL, Gill BS (1985) Molecular evidence for the origin and evolution of chromosome 4A in polyploid wheats. Can J Genet Cytol 27:246–250Google Scholar
  24. Shah SH, Gorham J, Forster BP, Wyn Jones RG (1987) Salt tolerance in the Triticeae: the contribution of the D genome to cation selectivity in wheat. J Exp Bot 36:254–269Google Scholar
  25. Waines JG, Barnhart D (1990) Constraints to germplasm evaluation. In: Proc Int Symp Evaluation Utilization Genet Res in Wheat Improvement. ICARDA, Aleppo, Syria, May 1989Google Scholar
  26. Waines JG, Payne PI (1987) Electrophoretic analysis of the high-molecular-weight glutenin subunits of Triticum monococcum, T. urartu, and the A genome of bread wheat (T. aestivum). Theor Appl Genet 74:71–76Google Scholar
  27. Wazuddin M, Driscoll CJ (1986) Chromosome constitution of polyploid wheats: introduction of diploid wheat chromosome 4. Proc Natl Acad Sci USA 83:3870–3874Google Scholar
  28. Weimberg R (1987) Solute adjustment in leaves of two species of wheat at two different stages of growth in response to salinity. Physiol Plant 70:381–388Google Scholar
  29. Wyn Jones RG, Gorham J (1990) Physiological effects of salinity. Scope for genetic improvement. In: Aceredo E, Fereres E, Gimeney C, Srirastava, JP (eds) Improvement and management of winter cereals under temperature, drought and solinity stresses. INIA, Madrid, Spain (in press)Google Scholar
  30. Wyn Jones RG, Gorham J, McDonnell E (1984) Organic and inorganic solute contents as selection criteria for salt tolerance in the Triticeae. In: Staples R (ed) Salinity tolerance in plants: Strategies for crop improvement. Wiley and Sons, New York, pp 189–203Google Scholar

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • J. Gorham
    • 1
  • A. Bristol
    • 1
  • E. M. Young
    • 1
  • R. G. Wyn Jones
    • 1
  1. 1.Center for Arid Zone Studies and School of Biological Sciences, Memorial BuildingGwyneddUK

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