ESTIMATION OF GENETIC RELATIONSHIPS IN THEOBROMA CACAO

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  • 1 U.S.D.A.-ARS Subtropical Horticulture Station, Miami, FL
  • 2 Dept. of Plant Pathology, U. of Florida, Gainesville.

Cacao is an important crop in the tropics, but its breeding has been hampered by a lack of understanding of its genetics. One result of this has been the introduction of “hybrid” trees which did not perform predictably under various environmental conditions. We are studying the inheritance of isoenzyme, RFLP, and Random Amplified Polymorphic DNA (RAPD™) markers in order to estimate the genetic relationships among and between populations. Our objectives include determining if any linkage exists between these molecular markers and witches' broom (Crinipellis perniciosa) resistance, a major disease of cacao.

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