Summary
The presence of crown disease (cc) in the oil palm can be masked by an intermediate gene (I c). Presence of the gene inI c i c-condition results in incomplete genetic penetrance in thecc-genotypes. No penetrance is observed in theccI c I c-palms. The existance of theI c-gene complicates selection work as a testcross with acci c i c-genotype is required to identify the genotype of the selections. This procedure requires 3 years.
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References
Berchoux, C. de &Gascon, J. P., 1963. L'arcure defoliée du palmier à huile. Eléments pour l'obtention de lignées résistantes. Oléagineux 18: 713–715.
Heusser, C., 1927. Crown disease. Commun. Gen. Exper. Sta. A.V.R.O.S., Gen. Ser., 31: 34 pp.
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Blaak, G. Epistasis for crown disease in the oil palm (Elaeis guineensis Jacq.). Euphytica 19, 22–24 (1970). https://doi.org/10.1007/BF01904661
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DOI: https://doi.org/10.1007/BF01904661