Summary
Meiotic pairing is described for a completely homozygous tetraploid derived from successively doubled haploid barley. The high quadrivalent frequency (4·58/cell) in cells with many chiasmata is indicative, either of discrete pairing at only two independent synaptic sites per chromosome or of continuous pairing amongst many sites in close proximity. A high frequency of discordance amongst ring quadrivalents (20·8 per cent) leads to lagging and irregular segregation in at least 20 per cent of first meiotic divisions.
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Callow, R., Hamey, Y. & Pattrick, S. Pairing of identical chromosomes in an isogenic tetraploid. Heredity 53, 107–111 (1984). https://doi.org/10.1038/hdy.1984.67
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DOI: https://doi.org/10.1038/hdy.1984.67
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