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Production of trigeneric (barley × wheat) × rye hybrids

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Summary

Rye (Secale cereale cv. Prolific 2n=14 and 2n =14 + 2B was crossed onto hybrids between barley (Hordeum vulgare 2n = 14) and wheat (Triticum aestivum 2n= 42). Pollinated florets were injected with GA3 to promote fertilization and hybrid embryo development. At 16 days after pollination the watery caryopses were removed, embryos dissected and cultured on a modified B5 medium. Approximately 20% of the cultured embryos produced both roots and coleoptile and developed into viable seedlings. Viable seeds were also obtained at a low frequency from the same cross combinations. The hybrids were wheat-like except for the hairy neck characteristic of rye. There were 35 chromosomes in somatic tissue; 21 wheat, 7 barley and 7 rye. The rye chromosomes were distinguishable by their larger size and terminal C-bands. A lower seed set was obtained using pollen from rye plants with 2n=14 + 2B chromosomes than from plants without B chromosomes.

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Communicated by K. Tsunewaki

Contribution No. 577, Ottawa Research Station

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Fedak, G., Armstrong, K.C. Production of trigeneric (barley × wheat) × rye hybrids. Theoret. Appl. Genetics 56, 221–224 (1980). https://doi.org/10.1007/BF00295452

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  • DOI: https://doi.org/10.1007/BF00295452

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