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Meiotic Chromosome Behavior and Pollen Fertility of a Triploid Hop 1
Author(s) -
Haunold Alfred
Publication year - 1974
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1974.0011183x001400060022x
Subject(s) - biology , pollen , ploidy , meiosis , humulus lupulus , botany , chromosome , open pollination , pollination , genetics , horticulture , gene , pepper
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.