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Incompatibility Alleles of Cocoa

Abstract

Knight and Rogers1 found five incompatibility alleles in the Theobroma cacao clones Parinari 7 (alleles 1 and 5), Parinari 35 (3 and 5), and Nanay 32 (2 and 4). Allele 1 is dominant to the others; alleles 2 and 3 are independent but are dominant to allele 4, which in turn is dominant to allele 5. A tree is incompatible both as male and female with another which has the same dominant allele; a tree carrying two independent alleles is incompatible with trees carrying either in the absence of others dominant to them.

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References

  1. Knight, R., and Rogers, H. H., Heredity, 9, 69 (1955).

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  2. Cope, F. W., Heredity, 17, 157 (1962).

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  3. Glendinning, D. R., Rep. Cocoa Res. Inst., Ghana, 1963–65, 75 (1966).

  4. Voelcker, O. J., Seventh Rep. Cacao Res. (Trinidad), 9 (1938).

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GLENDINNING, D. Incompatibility Alleles of Cocoa. Nature 213, 306 (1967). https://doi.org/10.1038/213306a0

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