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This article in CS

  1. Vol. 14 No. 6, p. 849-852
    Received: June 12, 1974

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Meiotic Chromosome Behavior and Pollen Fertility of a Triploid Hop1

  1. Alfred Haunold2



In triploid Humulus lupulus L., metaphase I cells had a mean of 3.46 trivalents, 6.47 bivalents, and 6.67 univalents/pollen mother cell. Chromosome distribution at anaphase I was irregular, and 1/3 of the cells had laggards. About half of the quartets had one or two micronuclei, but rarely three. Diploid females pollinated from the triploid male produced less than 1/4 the number of seeds/cone, as the open-pollinated diploid control, even though most of the pollen grains from the triploid appeared well-filled. Diploid flowers hand-pollinated from the triploid male developed into distinctly larger cones than did adjacent nonpollinated flowers on the same plant.

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