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Absence of qualitative genes controlling interspecific pairing in rye B chromosomes

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Summary

The meiotic behaviour of hybrids between Secale cereale carrying B chromosomes and S. vavilovii has been studied in order to estimate the effects of B chromosomes on hybrid meiotic pairing. The possible effect of Bs on the meiotic pairing of the offspring from backcrosses with S. vavilovii has been studied also. The results obtained clearly indicate that no detectable differences existed in chromosome pairing of hybrids with or without B chromosomes. The hypothetical existence of epistatic genes on cereale genome masking the effect of Bs has been rejected after the results obtained in backcrosses. Therefore, lack of qualitative genes controlling interspecific pairing on rye B chromosomes has been concluded. A quantitative effect of B chromosomes was detected only when they were in alien cytoplasm.

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Authors and Affiliations

  1. Departamento de Genética, Facultad de Biología, Universidad Complutense, Madrid, Spain

    R. Carmona & M. J. Puertas

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  1. R. Carmona
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  2. M. J. Puertas
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Communicated by F. Mechelke

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Carmona, R., Puertas, M.J. Absence of qualitative genes controlling interspecific pairing in rye B chromosomes. Theoret. Appl. Genetics 51, 111–117 (1977). https://doi.org/10.1007/BF00273822

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  • DOI: https://doi.org/10.1007/BF00273822

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