Summary
The sweet cherries (Prunus avium), which were previously reported to have extra chromosomes, are found from root tips to be diploid (2x=16). They cannot therefore be derived directly from hybridisation with sour cherries, as hitherto believed.
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References
Crane, M. B. andLawrence, W. J. C. (1929). “Genetical and Cytological Aspects of Incompatibility and Sterility in Cultivated Fruits.”Journ. Pomology,7, 276–301.
Darlington, C. D. (1928). “Studies inPrunus, I and II.”Journ. Gen. 19, 213–256.
—— (1930). “Studies inPrunus, III.” Ibid.22, 65–93.
Kobel, F. (1927). “Zytologische Untersuchungen an Prunoideen und Pomoideen.”Arch. Jul. Klaus-Stift. 3, 1–84.
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Darlington, C.D. Studies inPrunus, IV. Journ. of Genetics 28, 327–328 (1933). https://doi.org/10.1007/BF02981778
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DOI: https://doi.org/10.1007/BF02981778