Abstract
B chromosomes from an experimental population of the Japanese JNK strain of rye, isogenic for its Bs, have been backcrossed into twelve different inbred lines. The experiment is a way of studying the effects of the Bs against a range of different homozygous A chromosome backgrounds. This publication deals with pairing effects of both the As and the Bs, and their interactions, and with pollen mitosis. At meiosis there is a genotypic component to B effects, and they do not appear to act solely through a physical disturbance within the nucleus. In pollen the Bs are always present in more than 50% of the grains regardless of their pairing behaviour during meiosis; this result fits with a ‘parasitic’ model of the activity of rye Bs.
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Ortiz, M., Puertas, M.J., Jiménez, M.M. et al. B-chromosomes in inbred lines of rye (Secale cereale L.). Genetica 97, 65–72 (1996). https://doi.org/10.1007/BF00132582
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DOI: https://doi.org/10.1007/BF00132582