Chloroplast and mitochondrial DNA diversity in Theobroma cacao
- Cite this article as:
- Laurent, V., Risterucci, A.M. & Lanaud, C. Theoret. Appl. Genetics (1993) 87: 81. doi:10.1007/BF00223749
The variability of cocoa (Theobroma cacao) cytoplasmic genomes has been investigated. A total of 177 cocoa clones was surveyed for restriction fragment length polymorphism (RFLP) in chloroplast DNA and in mitochondrial DNA using two restriction endonucleases and various heterologous cytoplasmic probes. A high level of polymorphism was found for the mitochondrial genome. This study points up a structuring of the species that fits with the distinction between the Criollo and Forastero populations. In contrast to all previous analyses, a higher level of polymorphism is found among the Criollo clones while the Forastero clones form quite a homogeneous group.