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This article in AJ

  1. Vol. 49 No. 7, p. 359-362
    Received: Jan 18, 1957

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Crossing of Smooth Bromegrass, Bromus inermis Leyss, in the Greenhouse1

  1. K. H. MacKay and
  2. G. M. Dunn2



Single-crosses in smooth bromegrass can be obtained in the greenhouse by combining hot-water emasculation with open pollination. All clones in a group are emasculated except the pollen parent. Groups can be isolated by placing each on long-days at intervals of about 2 weeks. Immersing slightly immature panicles in water at 46° C. for 5 minutes provided effective emasculation. Maximum panicle production was obtained after 3 months of short-days in a cool greenhouse. Cross-fertility in the greenhouse was positively correlated with selffertility in the field. Yields of single-cross seed were increased by spraying the seed-parents with a fine mist at flowering.

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