Abstract
SEVERAL authors have reported that in Ribes nigrum L. (black currant) and R. grossularia L. (gooseberry), as in all other Ribes species so far investigated, a pair of satellited chromosomes is constantly present1–3. However, in 1957 it was noticed that only one satellite could be seen at metaphase in root tip cells of a black currant × gooseberry hybrid. Two further black currant × gooseberry hybrids have since become available for study and in both of these only one satellite is visible in root tip cells. The presence of two satellited chromosomes in two black currant and two gooseberry varieties (Baldwin and Boskoop Giant black currants, Broom Girl and Green Ocean gooseberries), parents of two of the hybrids mentioned above, has been confirmed. Evidently, in the hybrid, one of the parental satellites disappears. This phenomenon has been described in interspecific hybrids of Crepis by Navashin4, who includes this and other chromosome changes due to hybridization under the term amphiplasty4–5.
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References
Darlington, C. D., J. Pomol., 6, 242 (1927).
Meurman, O., Hereditas, 11, 289 (1928).
Zielinski, Q. B., Bot. Gaz., 114, 265 (1953).
Navashin, M., Cytologia, 5, 169 (1934).
Navashin, M., Z. indukt Abstamm.-u. VererbLehre, Supp. 2, 1148 (1928).
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KEEP, E. Amphiplasty in Ribes . Nature 188, 339 (1960). https://doi.org/10.1038/188339a0
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DOI: https://doi.org/10.1038/188339a0
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