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A novel intergeneric hybrid in the Triticeae: Triticum aestivum x Psathyrost achys juncea

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Two hybrid embryos of intergeneric origin between Triticum aestivum cv Fukuho (2n=6x=42, AABBDD) and Psathyrostachys juncea (2n=2x=14, NN) were successfully rescued. One hybrid plant had the expected chromosome number of 28 (ABDN), whereas the second plant had 35 chromosomes. The average meiotic chromosome pairing in the 35-chromosome hybrid was 21.87 univalents + 6.38 bivalents + 0.11 trivalents + 0.009 quadrivalents, which indicates that two copies of the N genome were present. Chromosome pairing in the 28-chromosome hybrid was low (1.35 bivalents), and pointed out the lack of homology between the wheat genomes and the P. juncea genome. These new hybrids showed some necrosis and chlorosis, which caused severe floral abortion in the plant that had 35 chromosomes. These problems became gradually less severe after 18 months.

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  1. Comeau A, Plourde A (1987) Cell, tissue culture and intergeneric hybridization for barley yellow dwarf virus resistance in wheat. Can J Plant Pathol 9:188–192

  2. Comeau A, Fedak G, St-Pierre CA, Thériault C (1985) Intergeneric hybrids between Triticum aestivum and species of Agropyron and Elymus. Cereal Res Commun 13:149–153

  3. Comeau A, Fedak G, St-Pierre CA, Cazeault R (1988) Intergeneric hybrids between Hordeum jubatum (4x) and Triticum aestivum (6x). Genome 30:245–249

  4. Dewey DR (1984a) The genomic system of classification as a guide to intergeneric hybridization with the perennial Triticeae. In: Gustafson JP (ed) Gene manipulation in plant improvement. Plenum Press, New York, pp 209–279

  5. Dewey DR (1984b) Wide-hybridization and induced-polyploid breeding strategies for perennial grasses of the Triticeae tribe. Iowa State J Res 58:383–399

  6. Espinasse A, Kimber G (1981) The analysis of meiosis in hybrids. IV. Pentaploid hybrids. Can J Genet Cytol 23:627–638

  7. Gamborg OL (1982) Callus and cell culture. In: Wetter LR, Constabel F (eds) Plant tissue culture methods. National Research Council of Canada, Saskatoon, pp 1–9

  8. Hermsen JGTH (1963) Hybrid necrosis as a problem for the wheat breeder. Euphytica 12:1–16

  9. Kimber G (1984) Technique selection for the introduction of alien variation in wheat. Z Pflanzenzucht 92:15–21

  10. Kimber G, Alonso LC (1981) The analysis of meiosis in hybrids. III. Tetraploid hybrids. Can J Genet Cytol 23:235–254

  11. Kruse A (1973) Hordeum x Triticum hybrids. Hereditas 73:157–161

  12. Mujeeb-Kazi A, Bernard M (1985) Cytogenetics of intergeneric Elymus Canadensis x Triticum aestivum hybrids (n=5x=35, SHABD) and their backcross progenies with T. aestivum. Z Pflanzenzucht 95:50–62

  13. Mujeeb-Kazi A, Roldan S, Suh DY, Sitch LA, Farooq S (1987) Production and cytogenetic analysis of hybrids between Triticum aestivum and some caespitose Agropyron species. Genome 29:537–553

  14. Murashige T (1974) Plant propagation through tissue cultures. Annu Rev Plant Physiol 25:135–166

  15. Norstog KJ (1973) New synthetic medium for the culture of premature barley embryos. In Vitro 8:307–308

  16. Plourde A, Comeau A, Fedak G, St-Pierre CA (1989) Production and cytogenetics of hybrids of Triticum aestivum x Leymus innovatus. Theor Appl Genet 78:436–444

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Contrib. no. 372

Communicated by G. S. Khush

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Plourde, A., Fedak, G., St-Pierre, C.A. et al. A novel intergeneric hybrid in the Triticeae: Triticum aestivum x Psathyrost achys juncea . Theoret. Appl. Genetics 79, 45–48 (1990).

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Key words

  • Russian wild rye
  • Wheat
  • Chromosome pairing
  • Meiosis