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Meiotic multivalent orientation and cell developmental delay
J Sybenga1, C Hsiao, J M de Vries
1Department of Genetics, Agricultural University Wageningen, The Netherlands.
Progress in Clinical and Biological Research
|January 1, 1989
Abstract:
In the heterozygote for the combination of an interchange (662W;3R/6R) and a Robertsonian split (3R) of rye, one type of adjacent orientation leads to trisomy in the progeny. Pollen mother cells with adjacent orientation of the translocation quinquivalent or with a trivalent and a bivalent were delayed in their development and appeared at prometaphase and metaphase later than cells with alternate quinquivalents. Delay in cell development is ascribed to unfavorable (early) prophase positioning of chromosomes.