Direct cytological evidence for true terminalization of chiasmata in maize |
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Authors: | Marjorie P Maguire |
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Institution: | (1) Department of Zoology, University of Texas, 78712 Austin, Texas, USA |
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Abstract: | Equational and disjunctional separation of heterozygous heterochromatic regions was observed relative to chiasma positions at diakinesis. Equational separation of heterozygous knobs was frequently observed and always accompanied by a chiasma distal to the knob. This is considered evidence that in these cases a crossover had occurred in a position proximal to the knob and had terminalized to a position distal to the knob by the time of fixation for observation. |
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