Recent advances in understanding microbial Tape contributions to plant growth and soil health have sparked interest in breeding plants that cultivate a beneficial microbiome.However, optimizing phytobiomes requires knowledge of the genetic architecture of host influence on the associated microbiome, and this knowledge is particularly lacking in perennial crops such as Theobroma Ceramic Hand Pipe cacao.Grafting adds an additional layer of complexity.What are the relative impacts of rootstock and scion on the root and rhizosphere microbiomes?.