Summary
The effect of B chromosomes on meiosis in autotetraploid Lolium perenne is such that the frequency of bivalents is increased and that of multivalents decreased quite independently of p.m.c. chiasma frequency. It appears, therefore, that the influence of B's in promoting the association of pairs of chromosomes is much less specific than was hitherto assumed, affecting homologous as well as homoeologous pairing.
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Macefield, A., Evans, G. The effect of B chromosomes on meiosis in autotetraploid Lolium perenne. Heredity 36, 393–397 (1976). https://doi.org/10.1038/hdy.1976.46
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DOI: https://doi.org/10.1038/hdy.1976.46
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